#import pdb; pdb.set_trace()
import sys

def main():
    red = 0
    blue = 0
    for i in range(3):
        if "RED" == raw_input():
            red += 1
        else:
            blue += 1
    
    if red > blue:
        print "RED"
    else:
        print "BLUE"
        
if __name__ == '__main__':
    main()