#include <bits/stdc++.h>   using namespace std;   const int maxn = 100 + 10;   char s[maxn];   int f(char ch) {     if (ch ==  A ) return 1;     if (ch ==  B ) return 2;     if (ch ==  C ) return 4;     return 0;   }   int main() {     scanf( %s , s + 1);     int l = strlen(s + 1);     for (int i = 1; i <= l - 2; ++i) {       int t = f(s[i]) | f(s[i + 1]) | f(s[i + 2]);       if (t == 7) {         cout <<  Yes  << endl;         return 0;       }     }     cout <<  No ;     return 0;   }   