#include <iostream>
#include <string>

using namespace std;

int main()
{
	string ulaz;
	cin >> ulaz;
	if (ulaz == "I" || ulaz == "II" || ulaz == "III" || ulaz == "V")
		{cout << ulaz;}
	else if (ulaz == "VI"){cout << "IV" << endl;}
	else if (ulaz == "VII"){cout << "VII" << endl;}
	else if (ulaz == "VIII"){cout << "VIII" << endl;}
	else if (ulaz == "IV"){cout << "IV" << endl;}
	else if (ulaz == "IX"){cout << "IX" << endl;}
	else if (ulaz == "X"){cout << "X" << endl;}
	else if (ulaz == "XI"){cout << "IX" << endl;}
	else if (ulaz == "XII"){cout << "XII" << endl;}
	else if (ulaz == "XIII"){cout << "XIII" << endl;}
	else if (ulaz == "XIV"){cout << "XIV" << endl;}
	else if (ulaz == "XV"){cout << "XV" << endl;}
	else if (ulaz == "XVI"){cout << "XIV" << endl;}
	else if (ulaz == "XVII"){cout << "XVII" << endl;}
	else if (ulaz == "XVIII"){cout << "XVIII" << endl;}
	else if (ulaz == "XIX"){cout << "XIX" << endl;}
	else if (ulaz == "XX"){cout << "XX" << endl;}
	else if (ulaz == "XXI"){cout << "XIX" << endl;}
	else if (ulaz == "XXII"){cout << "XXII" << endl;}
	else if (ulaz == "XXIII"){cout << "XXIII" << endl;}
	else if (ulaz == "XXIV"){cout << "XXIV" << endl;}
	else if (ulaz == "XXV"){cout << "XXV" << endl;}
	else if (ulaz == "XXVI"){cout << "XXIV" << endl;}
	else if (ulaz == "XXVII"){cout << "XXVII" << endl;}
	else if (ulaz == "XXVIII"){cout << "XXVIII" << endl;}
	else if (ulaz == "XXIX"){cout << "XXIX" << endl;}
	else if (ulaz == "XXX"){cout << "XXX" << endl;}
	else if (ulaz == "XXXI"){cout << "XXIX" << endl;}
	else if (ulaz == "XXXII"){cout << "XXXII" << endl;}
	else if (ulaz == "XXXIII"){cout << "XXXIII" << endl;}
	else if (ulaz == "XXXIV"){cout << "XXXIV" << endl;}
	else if (ulaz == "XXXV"){cout << "XXXV" << endl;}
	else if (ulaz == "XXXVI"){cout << "XXXIV" << endl;}
	else if (ulaz == "XXXVII"){cout << "XXXVII" << endl;}
	else if (ulaz == "XXXVIII"){cout << "XXXVIII" << endl;}
	else if (ulaz == "XXXIX"){cout << "XXXIX" << endl;}
	else if (ulaz == "XL"){cout << "XL" << endl;}
	else if (ulaz == "XLI"){cout << "XLI" << endl;}	
	else if (ulaz == "XLII"){cout << "XLII" << endl;}
	else if (ulaz == "XLIII"){cout << "XLIII" << endl;}
	else if (ulaz == "XLIV"){cout << "XLIV" << endl;}
	else if (ulaz == "XLV"){cout << "XLV" << endl;}
	else if (ulaz == "XLVI"){cout << "XLIV" << endl;}
	else if (ulaz == "XLVII"){cout << "XLVII" << endl;}
	else if (ulaz == "XLVIII"){cout << "XLVIII" << endl;}
	else if (ulaz == "XLIX"){cout << "XLIX" << endl;}
	else if (ulaz == "L"){cout << "L" << endl;}
	else if (ulaz == "LI"){cout << "LI" << endl;}
	else if (ulaz == "LII"){cout << "LII" << endl;}
	else if (ulaz == "LIII"){cout << "LIII" << endl;}	
	else if (ulaz == "LIV"){cout << "LIV" << endl;}
	else if (ulaz == "LV"){cout << "LV" << endl;}
	else if (ulaz == "LVI"){cout << "LIV" << endl;}
	else if (ulaz == "LVII"){cout << "LVII" << endl;}
	else if (ulaz == "LVIII"){cout << "LVIII" << endl;}
	else if (ulaz == "LIX"){cout << "LIX" << endl;}
	else if (ulaz == "LX"){cout << "LX" << endl;}
	else if (ulaz == "LXI"){cout << "LIX" << endl;}
	else if (ulaz == "LXII"){cout << "LXII" << endl;}
	else if (ulaz == "LXIII"){cout << "LXIII" << endl;}
	else if (ulaz == "LXIV"){cout << "LXIV" << endl;}
	else if (ulaz == "LXV"){cout << "LXV" << endl;}	
	else if (ulaz == "LXVI"){cout << "LXIV" << endl;}
	else if (ulaz == "LXVII"){cout << "LXVII" << endl;}
	else if (ulaz == "LXVIII"){cout << "LXVIII" << endl;}
	else if (ulaz == "LXIX"){cout << "LXIX" << endl;}
	else if (ulaz == "LXX"){cout << "LXX" << endl;}
	else if (ulaz == "LXXI"){cout << "LXIX" << endl;}
	else if (ulaz == "LXXII"){cout << "LXXII" << endl;}
	else if (ulaz == "LXXIII"){cout << "LXIII" << endl;}
	else if (ulaz == "LXXIV"){cout << "LXXIV" << endl;}
	else if (ulaz == "LXXV"){cout << "LXXV" << endl;}
	else if (ulaz == "LXXVI"){cout << "LXXIV" << endl;}	
	else if (ulaz == "LXXVII"){cout << "LXXVII" << endl;}	
	else if (ulaz == "LXXVIII"){cout << "LXXVIII" << endl;}
	else if (ulaz == "LXXIX"){cout << "LXXIX" << endl;}
	else if (ulaz == "LXXX"){cout << "LXXX" << endl;}
	else if (ulaz == "LXXXI"){cout << "LXXIX" << endl;}
	else if (ulaz == "LXXXII"){cout << "LXXXII" << endl;}
	else if (ulaz == "LXXXIII"){cout << "LXXXIII" << endl;}
	else if (ulaz == "LXXXIV"){cout << "LXXXIV" << endl;}
	else if (ulaz == "LXXXV"){cout << "LXXXV" << endl;}
	else if (ulaz == "LXXXVI"){cout << "LXXXIV" << endl;}
	else if (ulaz == "LXXXVII"){cout << "LXXXVII" << endl;}
	else if (ulaz == "LXXXVIII"){cout << "LXXXVIII" << endl;}
	else if (ulaz == "LXXXIX"){cout << "LXXXIX" << endl;}	
	else if (ulaz == "XC"){cout << "XC" << endl;}
	else if (ulaz == "XCI"){cout << "XCI" << endl;}
	else if (ulaz == "XCII"){cout << "XCII" << endl;}
	else if (ulaz == "XCIII"){cout << "XCIII" << endl;}
	else if (ulaz == "XCIV"){cout << "XCIV" << endl;}
	else if (ulaz == "XCV"){cout << "XCV" << endl;}
	else if (ulaz == "XCVI"){cout << "XCIV" << endl;}
	else if (ulaz == "XCVII"){cout << "XCVII" << endl;}
	else if (ulaz == "XCVIII"){cout << "XCVIII" << endl;}
	else if (ulaz == "XCIX"){cout << "XCIX" << endl;}
	else if (ulaz == "C"){cout << "C" << endl;}
	return 0;
}