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#include <bits/stdc++.h>

#include <iostream>

using namespace std;

int main(){

//program to check if one string is valid shuffle of two other or not.

string s1;

cin>>s1;

string s2;

cin>>s2;

string sr;

cin>>sr;

int i = 0, j = 0;

int f = 0;

for(int k=0;k<sr.length();k++){

if (i < s1.length() && s1[i] == sr[k])

i++;

else if (j < s2.length() && s2[j] == sr[k])

j++;

else {

f = 1;

cout<<"False"<<endl;

}

}

if(f==0) cout<<"True"<<endl;

return 0;

}