#include<bits/stdc++.h> using namespace std; string s[11000]; int main(){ int sum=0; while(cin>>s[++sum]){ continue; } sort(s+1,s+sum+1); int x=s[1].length(); for(int i=2;i<=sum;i++){ int y=0; while(s[i][y]==s[i-1][y]&&y<s[i-1].length()) y++; x+=s[i].length()-y; } cout<<x+1; return 0; }