a=int(input())
b=a//100
c=a%100//10
d=str(10+b)
e=str(c*6)
if (int(d)<10) and (int(e)<10):
    print("0"+d+":0"+e)
elif int(d)<10:
    print("0"+d+":"+e)
elif int(e)<10:
    print(d+":0"+e) 
else:
    print(d+":"+e)