596 B | 596 chars
import sys
from math import sqrt, pi, sin, factorial
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = " " : [*map(int,inp().split(x))]
mfi = lambda x = " " : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def f(A, C, l):
return A * sum([i * i for i in l]) + C * min(l)
def solve():
A, C = mii()
l = mii()
g = []
for i in range(3):
l2 = l[:]
l2[i] += 1
g.append(f(A, C, l2))
print(["RED", "GREEN", "BLUE"][g.index(max(g))])
if __name__ == "__main__":
tc = ii()
for t in range(1, tc+1):
solve()