#include <iostream>
#include <cmath>

using namespace std;

int main() {
    int n, m;
    int cnt = 0;
    int mxC = 0, mxB = 0, mxS = 0, mx = 10000000;
    cin >> n >> m;
    string s[n];
    for(int i = 0; i < n; i++){
      cin >> s[i];
    }
    for(int i = 0; i < n; i++){
      for(int j = 0; j < m; j++){
        if((s[i])[j] == '*' || (s[i])[j] == '#' || (s[i])[j] == '&'){
          mx = min(mx, j);
        }
      }
    }
    if(mx > ((m-1)/2)){
      mx = m/2;
    }
    mxS = mx;
    mx = 10000000;
    for(int i = 0; i < n; i++){
      for(int j = 0; j < m; j++){
        if( ((int)((s[i])[j])) >= 97 && ((int)((s[i])[j])) <= 122){
          mx = min(mx, j);
        }
      }
    }
    if(mx > ((m-1)/2)){
      mx = m/2;
    }
    mxB = mx;
    mx = 10000000;
    for(int i = 0; i < n; i++){
      for(int j = 0; j < m; j++){
        if( ((int)((s[i])[j])) >= 48 && ((int)((s[i])[j])) <= 57){
          mx = min(mx, j);
        }
      }
    }
    if(mx > ((m-1)/2)){
      mx = m/2;
    }
    mxC = mx;
    cout << mxC + mxS + mxB << endl;
    return 0;
}