#include <iostream>
using namespace std;
int main() {
char a = 'C';
char b = 'R';
char c = 'M';
if (b > c) {
cout << a - c << ". ";
}
if (a > b) {
cout << b<< " ";
}
if (a > c) {
cout << a - c<< " ";
}
return 0;
}
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