import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

S = read().split()

r = 0; b = 0
for s in S:
    if s == b'RED':
        r += 1
    else:
        b += 1

answer = 'RED' if r > b else 'BLUE'
print(answer)