F={"0$it"[-2,-1]} System.in.eachLine{(a,b,c,d,e,f)=it.split(/\D/)*.toLong() c+=f b+=c>59?e+1:e println"$it=${F((b>59?a-~d:a+d)%24)}:${F(b%60)}:${F(c%60)}"}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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