694 B | 694 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
sys.setrecursionlimit(10**7)
BLANK = " "
#inp = input
inp = lambda : sys.stdin.readline().rstrip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
a, b = mii()
for h in range(12):
for m in range(0, 60, 2):
m_ang = m * 6
h_ang = h * 30 + m // 2
if a == h_ang and b == m_ang:
return "O"
return "X"
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()
p(ret)