var x1,x2,x3,x4,x5:integer;
s:real;
BEGIN
read(x1,x2,x3,x4,x5);
s:= (x1+x2+x3)/(x4+x5);
if round(s)=s then writeln("celoe - "s);
END.
var x1,x2,x3,x4,x5:integer;
s:real;
BEGIN
read(x1,x2,x3,x4,x5);
s:= (x1+x2+x3)/(x4+x5);
if round(s)=s then writeln("celoe - "s);
END.