var a:array[1..3,1..4]of integer;
j,i,sum:integer;
begin
for i:=1 to 3 do for j:=1 to 4 do readln(a[i,j]);
for i:=1 to 3 do sum:=sum+a[i,4];
writeln(sum);
end.
var a:array[1..3,1..4]of integer;
j,i,sum:integer;
begin
for i:=1 to 3 do for j:=1 to 4 do readln(a[i,j]);
for i:=1 to 3 do sum:=sum+a[i,4];
writeln(sum);
end.