#include <iostream>
#include <cstring>
using namespace std;
 
const int MAX_LENGTH = 20;
 
int main() {
	char array[MAX_LENGTH + 1], matrix[MAX_LENGTH + 1][MAX_LENGTH + 1];
	int n;
	cin >> n;
	cin.getline(array, MAX_LENGTH);
	for (int i = 0; i < n; ++i) {
		cin.getline(array, MAX_LENGTH);
		for (int j = 0; j < n; ++j) {
			matrix[i][j] = array[j];
		}
	}
	int countR = 0, countM = 0, countC = 0;
	int countr = 0, countm = 0, countc = 0;
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < n; ++j) {
			if (matrix[i][j] == 'M') {
				cout << matrix[i][j] << "<-|";
				++countm;
			} else if (matrix[i][j] == 'C') {
				cout << matrix[i][j] << "<-|";
					++countc;
			} else if (matrix[i][j] == 'R') {
				cout << matrix[i][j] << "<-|";
				++countr;
			}
			cout << i << " " << j <<" []";
			cout <<"count m: " << countm << "| count c: " << countc << "|count r: " << countr << "||";
			cout << "\n";
		}
		if (countm != 0) {
			++countM;
			countm = 0;
		}
		if(countc != 0) {
			++countC;
			countc = 0;
		}
		if (countr != 0) {
			++countR;
			countr = 0;
		}
 
	}
	if (countR > countM && countM > countC) {
		cout <<"R";
	} else if (countM > countR && countR > countC) {
		cout<< "M";
	} else {
		cout << "C";
	}
	return 0;
}

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NQpSQ01NQwpNUkNDUgpNQ1JDQwpNTU1STQpNTU1DUg==

5
RCMMC
MRCCR
MCRCC
MMMRM
MMMCR