program taimer;
var
ch1,ch2,cch2,mch2,sch2,wyx:string;
k,w,z,i,y,c1ch1,c2ch1,m1ch1,m2ch1,s1ch1,s2ch1,cn1ch1,cn2ch1,cnoch1,mn1ch1,mn2ch1,mnoch1,sn1ch1,sn2ch1,snoch1:integer;
cnch2,mnch2,smch2,cnoch2,mnoch2,snoch2,co,mo,so,f,sp,mp,cp:integer;
begin
k:=1;
w:=0;
writeln('введите первое число');
readln(ch1);
   begin
        c1ch1:=ord(ch1[1]);
        c2ch1:=ord(ch1[2]);
        cn1ch1:=c1ch1-(ord(0));
        cn2ch1:=c2ch1-(ord(0));
        cnoch1:=(cn1ch1*10)+cn2ch1;

        m1ch1:=ord(ch1[4]);
        m2ch1:=ord(ch1[5]);
        mn1ch1:=m1ch1-(ord(0));
        mn2ch1:=m2ch1-(ord(0));
        mnoch1:=(mn1ch1*10)+mn2ch1;

        s1ch1:=ord(ch1[7]);
        s2ch1:=ord(ch1[8]);
        sn1ch1:=s1ch1-(ord(0));
        sn2ch1:=s2ch1-(ord(0));
        snoch1:=(sn1ch1*10)+sn2ch1;
   end;
readln(ch2);
   begin
        for i:=1 to length(ch2) do
           begin
                z:=ord(ch2[i]);
                if (z<>ord(';')) and (k=1) then
                cch2:=cch2+ch2[i]
                else
                if (z<>ord(';')) and (k=2) then
                mch2:=mch2+ch2[i]
                else
                if (z<>ord(';')) and (k=3) then
                sch2:=sch2+ch2[i]
                else
                if (z=ord(';')) then
                k:=k+1;
           end;
   end;
      for i:=length(cch2) downto 1 do
         begin
              y:=exp(ln(10)*i);
              cnch2:=(ord(cch2[i]))-ord(0);
              w:=w+1;
              cnoch2:=cnoch2+(cnch2[w]*y);
         end;
      for i:=length(mch2) downto 1 do
         begin
              y:=exp(ln(10)*i);
              mnch2:=(ord(mch2[i]))-ord(0);
              w:=w+1;
              mnoch2:=mnoch2+(mnch2[w]*y);
         end;
      for i:=length(sch2) downto 1 do
         begin
              y:=exp(ln(10)*i);
              snch2:=(ord(sch2[i]))-ord(0);
              w:=w+1;
              snoch2:=snoch2+(snch2[w]*y);
         end;
co:=cnoch1+cnoch2;
mo:=mnoch1+mnoch2;
so:=snoch1+snoch2;
sp:=so mod 60;
f:=so div 60;
mo:=mo+f;
mp:=mo mod 60;
f:=mo div 60;
co:=co+f;
cp:=co mod 60;
f:=co div 60;
writeln(cp,':',mp,':',sp,'+',f);
readln(wyx);
end.