# coding: utf-8
from enum import Enum

class Color(Enum):
    RED = 1
    BLUE = 2
    
def main():
    
    d = {Color.BLUE.name:0, Color.RED.name:0}
    
    for i in range(3):
        d[input()] += 1

    result = Color.RED.name

    if d[Color.RED.name] < d[Color.BLUE.name]:
        result = Color.BLUE.name
    
    print(result)

if __name__=='__main__':
    main()