[題解] f706 時區 (Zone)

def zero(a):
    if a < 10:
        return "0"+str(a)
    else:
        return a

H,M,S,T = map(int, input().split())
skip = 90*T
M += skip%60
H += skip//60+M//60
M=M%60
H=H%36
print("{}:{}:{}".format(H,zero(M),zero(S)))