#include <iostream>
main(){std::string a,b;std::cin>>a;printf(a==b.assign(a.rbegin(),a.rend())?"wins":"loses");}
or, if you can accept a trailing newline in the output:
#include <iostream>
main(){std::string a,b;std::cin>>a;puts(a==b.assign(a.rbegin(),a.rend())?"wins":"loses");}