rt,

#include <iostream>
#include <string>
using namespace std;
string s;
bool abc[3];
int main(){
	cin>>s;
	for(int i=0;i<3;i++){
		if(s[i]!='A' && s[i]!='B' && s[i]!='C'){
			cout<<"No";
			return 0;
		}
		else if(abc[s[i]-'A']){
			cout<<"NO";
			return 0;
		}
		abc[s[i]-'A']=true;
	}
	cout<<"Yes";
	return 0;
}