program ideone;
uses SysUtils, DateUtils;
var sum:TDateTime;
var Str:String;
var aString:String;
var bString:String;
begin
readln(aString);
readln(bString);
sum := StrToDateTime(aString) + StrToDateTime(bString);
Str:=Format('%d:%.2d',[HoursBetween(sum, 0),MinuteOf(sum)]);
WriteLn(Str);
Str:=Format('%d:%s',[HourOf(sum),FormatDateTime('nn',sum)]);
WriteLn(Str);
end.
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