ln=input().split()
hour=int(ln[0])
minute=int(ln[1])
lag=float(ln[2].replace('UTC',''))-9.0
lagmin=60*(lag-int(lag))

hour=int((hour+lag+24)%24)
minute=int(round((minute+lagmin+60.0)%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)