a=input()
print(len(a)*25+26)
#include <bits/stdc++.h>
using namespace std;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
string s;
cin >> s;
set<string> st;
for(char c = 'a'; c <= 'z'; c++) {
for(int i = 0; i <= (int) s.size(); i++) {
st.insert(s.substr(0, i) + c + s.substr(i, (int) s.size() - i));
}
}
cout << (int) st.size();
}/*1687692541.065371*/
Differences of the permutations | Doctor's Secret |
Back to School | I am Easy |
Teddy and Tweety | Partitioning binary strings |
Special sets | Smallest chosen word |
Going to office | Color the boxes |
Missing numbers | Maximum sum |
13 Reasons Why | Friend's Relationship |
Health of a person | Divisibility |
A. Movement | Numbers in a matrix |
Sequences | Split houses |
Divisible | Three primes |
Coprimes | Cost of balloons |
One String No Trouble | Help Jarvis! |
Lift queries | Goki and his breakup |
Ali and Helping innocent people | Book of Potion making |