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=(hour+lag+24)%24
minute=round((minute+lagmin+60.0)%60,1)
if hour<10:
    print('0%d:%d'%(hour,minute))
else:
    print('%d:%d'%(hour,minute))