#include <iostream>
#include<cstring>
using namespace std;
int main()
{
    char s[201],cuv[20];
    cout<<"s=";
    cin.getline(s,201);
    int i=0,k=0,ok,j;
    while(s[i]!='\0'&&s[i]!=' ');
    {
        cuv[k]=s[i];
        i++;
        k++;
    }
    cuv[k]='\0';
    i=j=0;

    while(j<strlen(s))
    {   k=0;
        ok=1;
       while(s[j]!='\0'&&s[j]!=' ')
       {
           if(s[j]!=cuv[k])
            ok=0;
              k++;
              j++;
       }
       if(ok==1)
    {   if(s[i]!='\0')
        {strcpy(s+i,s+j+1);
        j=i;
        }
        else
        strcpy(s+i,s+j);
    }
        else
        i=j=j+1;

    }
    cout<<s;
    return 0;
}