uses crt;
var a,b,c:string;
i,d1,d2:integer;
begin
clrscr;
write('Nhap xau a:'); readln(a);
write('Nhap xau b:'); readln(b);
d1:=length(a);
d2:=length(b);
writeln('Tong do dai hai xau la: ',d1+d2);
c:=#32;
for i:=1 to d1 do
if (a[i] in ['A'..'Z']) or (a[i] in ['a'..'z']) then c:=c+a[i];
for i:=1 to d2 do
if b[i] in ['0'..'9'] then c:=c+b[i];
writeln('Xau c la: ',c);
readln;
end.