#include <cstdio>
#include <cmath>
#define rep( i, n, m ) for(ll i = ( n ); i < ( m ); i++)
using ll = long long int;

int give_water( int* array, int begin, int end );

int main( void ){
	ll R, r;
	if (!scanf( "%lld %lld", &R, &r ))
		return 0;
	if (R < r){
		printf( "K\n" );
		return 0;
	}
		printf( "S\n" );
	return 0;
}