no ans
it is so easy
ans
python
h1,m1 = map(int,input().split())
h2,m2 = map(int,input().split())
if h2*60+m2<=h1*60+m1:
print("no")
else:
print(f"{((h2*60+m2)-(h1*60+m1))//60} {((h2*60+m2)-(h1*60+m1))%60}")
# JalenLam_progamer IQ380 Jalenpro