#!/usr/bin/env python

def main():
    b = 0
    r = 0
    for i in range(3):
        if input().strip() == 'BLUE':
            b += 1
        else:
            r += 1
    if b > r:
        print('BLUE')
    else:
        print('RED')

if __name__ == '__main__':
    main()