#include #include using namespace std; int main(){ char alf[100]; cin >> alf; char ans[] = "YES"; char no[] ="NO"; for(int i =0;alf[i] != '\0';i++){ for(int j= i+1; alf[j] !='\0' ;j++){ if(alf[i] == alf[j]){ strcpy(ans , no) ; } } } cout <