#include <bits/stdc++.h>
using namespace std;
const long long int mod = 1e9 + 7;
const long long int mod1 = 998244353;
const long long int inf = 9e18 + 5;
const double pi = acosl(-1.0l);
const long double eps = 1e-9;
bool equalTo(double a, double b) {
  if (fabs(a - b) <= eps)
    return true;
  else
    return false;
}
bool notEqual(double a, double b) {
  if (fabs(a - b) > eps)
    return true;
  else
    return false;
}
bool lessThan(double a, double b) {
  if (a + eps < b)
    return true;
  else
    return false;
}
bool lessThanEqual(double a, double b) {
  if (a < b + eps)
    return true;
  else
    return false;
}
bool greaterThan(double a, double b) {
  if (a > b + eps)
    return true;
  else
    return false;
}
bool greaterThanEqual(double a, double b) {
  if (a + eps > b)
    return true;
  else
    return false;
}
void swap(long long int &a, long long int &b) {
  long long int t = a;
  a = b;
  b = t;
}
long long int min(long long int a, long long int b) {
  if (a < b) return a;
  return b;
}
long long int max(long long int a, long long int b) {
  if (a > b) return a;
  return b;
}
long long int pow(long long int a, long long int b) {
  a %= mod;
  long long int ans = 1;
  while (b > 0) {
    if (b & 1) ans = ans * a % mod;
    a = a * a % mod;
    b /= 2;
  }
  return ans;
}
int main() {
  ios_base ::sync_with_stdio(0);
  cin.tie(0);
  string s;
  cin >> s;
  long long int flg = 0;
  long long int n = s.size();
  for (int i = 0; i < n - 2; i++) {
    if (s[i] == '.') continue;
    if (s[i + 1] != '.' && s[i + 2] != '.' && s[i] != s[i + 1] &&
        s[i + 1] != s[i + 2] && s[i] != s[i + 2]) {
      flg = 1;
      break;
    }
  }
  if (flg)
    cout << "Yes";
  else
    cout << "No";
}
