def printTime(s):
h=s//3600
m=(s%3600)//60
sec=s-((h*3600)+(m*60))
if(h>12):
h=h%12
if(h==0):
h=12
print(str(h).zfill(2)+":"+str(m).zfill(2)+":"+str(sec).zfill(2))
h,m,s=map(int,input().split(":"))
k,x=map(int,input().split())
time=(h*60*60)+(m*60)+s
printTime(time+x)
printTime(time+(x//k))
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