#include #define rep(i, n) for (int (i) = 0; (i) < (int)(n); (i)++) const int dx[] = {1, 0, -1, 0}; const int dy[] = {0, 1, 0, -1}; using namespace std; typedef long long ll; typedef vector vi; typedef vector vll; int main() { cin.tie(0); ios::sync_with_stdio(false); system( "ls -1 -A /bin | grep \"^[^/.]\" " ); return 0; }