program p40;
uses crt;
var i:byte;
a:string;
begin
clrscr;
writeln('a=');readln(a) ;
for i:=1 to length(a) do
writeln(copy(a,1,i));
readln;
end.
program p40;
uses crt;
var i:byte;
a:string;
begin
clrscr;
writeln('a=');readln(a) ;
for i:=1 to length(a) do
writeln(copy(a,1,i));
readln;
end.