b

    #include <bits/stdc++.h>

    using namespace std ;
    #define sz(s) int(s.size())
    #define all(s) s.begin() , s.end()
    #define getline(s) getline(cin >> ws, s)
    #define cin(v) for (auto& i : v) cin >> i ;
    #define cout(v) for (auto& i : v) cout << i << " "
    #define pb(x) push_back(x)
    #define ll long long
    #define ull unsigned long long
    #define Mod 1'000'000'007
    #define INF 2'000'000'000
    #define Num_of_Digits(n) ((int)log10(n)+1)
    #define fixed(n) fixed << setprecision(n)
    #define imin INT_MIN
    #define imax INT_MAX
    #define Time cerr << "Time Taken: " << (float)clock() / CLOCKS_PER_SEC << " Secs" << "\n" ;


    void ABDEL3AL () {
        ios_base::sync_with_stdio(false); cin.tie(nullptr) , cout.tie(nullptr) ;
    #ifndef ONLINE_JUDGE
        freopen("input.txt" , "r" , stdin) , freopen("output.txt" , "w" , stdout) ;
    #endif
        Time
    }


    int main() {
        ABDEL3AL() ;
        string s , t ; cin >> s >> t ;
        if (s == t) cout << "Yes" , 0 ;
        else if (sz(t) == sz(s)) {
            for (int i = 0; i < sz(t); i++) {
                if (s[i] != t[i]) swap(t[i] , t[i + 1]) ;
                if (s == t) return cout << "Yes" , 0 ;
            }
            return cout << "No" , 0 ;
        }
        else cout << "No" ;

    }