t,v=map(int,input().split())
t2,v2=map(int,input().split())
if t2 < 0 and v2 >=10:
print("A storm warning for tomorrow! Be careful and stay home if possible!")
elif t2 < t:
print("MCHS warns! Low temperature is expected tomorrow.")
elif v2 > v:
print("MCHS warns! Strong wind is expected tomorrow.")
else:
print("No message")