#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    auto move = [&](char c,int add) -> char {
        int v = c-'A';
        v += add,v %= 26;
        return v+'A';
    };

    vector<vector<string>> S1(26),S2(26),S3(26),S4(26);
    for(int d=0; d<26; d++){
        if(d == 0){
            for(char c='A'; c<='Z'; c++){
                string s = "";
                s += c;
                S1.at(c-'A').push_back(s);
            }
        }
        else for(char c='A'; c<'A'+gcd(26,d); c++){
            string s = "";
            char now = c;
            s += now;
            now = move(now,d);
            while(now != c) s += now,now = move(now,d);
            if(gcd(26,d) == 13) S2.at(c-'A').push_back(s);
            if(gcd(26,d) == 2) S3.at(c-'A').push_back(s);
            if(gcd(26,d) == 1) S4.at(c-'A').push_back(s);
        }
    }
    auto dfs = [&](auto dfs,int pos) -> void {
        for(auto s : S1.at(pos)){
            int n = s.size();
            for(int i=0; i<n; i++) cout << s.at(i) << s.at((i+1)%n) << "\n";
        }
        for(auto s : S2.at(pos)){
            int n = s.size();
            for(int i=0; i<n; i++){
                cout << s.at(i) << s.at((i+1)%n) << "\n";
                if(i+1 != n) dfs(dfs,s.at(i+1)-'A');
            }    
        }
        for(auto s : S3.at(pos)){
            int n = s.size();
            for(int i=0; i<n; i++){
                cout << s.at(i) << s.at((i+1)%n) << "\n";
                if(i+1 != n) dfs(dfs,s.at(i+1)-'A');
            }    
        }
        for(auto s : S4.at(pos)){
            int n = s.size();
            for(int i=0; i<n; i++){
                cout << s.at(i) << s.at((i+1)%n) << "\n";
                if(i+1 != n) dfs(dfs,s.at(i+1)-'A');
            }    
        }
        S1.at(pos).clear();
        S2.at(pos).clear();
        S3.at(pos).clear();
        S4.at(pos).clear();
    };
    dfs(dfs,0);
}