#include <iostream>
using namespace std;
int main()
{
	string str1, str2, str3;

	cout << "Please, enter first string: ";
	cin>>str1;
	int n1=str1.length();
	char vect1[n1];
	for (int i=0; i<n1; i++)
	{vect1[i]=str1[i];}

	cout << "Please, enter second string: ";
	cin>>str2;
	int n2=str2.length();
	char vect2[n2];
	for (int i=0; i<n2; i++)
	{vect2[i]=str2[i];}

	cout << "Please, enter third string: ";
	cin>>str3;
	int n3=str3.length();
	char vect3[n3];
	for (int i=0; i<n3; i++)
	{vect3[i]=str3[i];}


	int i=0, j=0, c=0, k;
	while (i<n1 && j<n3)
	{
		if (vect1[i]!=vect3[j])
		{
			if (c>0)
			{
				k=0;
				while (k<c)
				{
					cout<<vect1[k];
					k++;
				}
				i=0;
				c=0;
			}
			if (c==0)
			{
				cout<<vect3[j];
				j++;
			}
		}
		if (vect1[i]==vect3[j])
		{
			i++;
			j++;
			c++;
		}
		if (c==n1)
		{
			i=0;
			c=0;
			for (int k=0; k<n2; k++)
			cout<<vect2[k];
		}
	}
	return 0;
}