ln=input().split()
hour=int(ln[0])
minute=int(ln[1])
time=24*60
lag=float(ln[2].replace('UTC',''))-9.0
time+=hour*60+minute
time+=lag*60
hour=int(time//60)%24
minute=int(round(time%60,1))
if hour<10:
    hour='0'+str(hour)
else:
    hour=str(hour)
if minute<10:
    minute='0'+str(minute)
else:
    minute=str(minute)

print(hour+':'+minute)