program cym;
uses crt;
var a, s1, s2: integer;
begin
writeln('a='); readln (a);
s2:= a div 1000+(a div 100)mod 10;
s1:=a mod 10+(a div 10)mod 10;
if s1=s2 then writeln (' yes s1=s2')
else writeln( s1>s2,' no') ;
writeln('s1=',s1);
writeln('s2=',s2);
readkey;
end.
uses crt;
var a, s1, s2: integer;
begin
writeln('a='); readln (a);
s2:= a div 1000+(a div 100)mod 10;
s1:=a mod 10+(a div 10)mod 10;
if s1=s2 then writeln (' yes s1=s2')
else writeln( s1>s2,' no') ;
writeln('s1=',s1);
writeln('s2=',s2);
readkey;
end.