#include <string.h>
#include <iostream.h>
int main()
{
    char a[1000000],b[1000000];
    while(cin>>a>>b)
    {
        int flag=0;
        long pos1=strlen(a)-1;
        long pos2=strlen(b)-1;
        while(1)
        {
            if(a[pos1]==b[pos2])
            {
                pos1--;
                pos2--;
            }
            else
            pos2--;
            if (pos1<0) {flag=0;break;}
            if (pos2<0 && pos1>=0) {flag=1;break;}
        }
        if(flag) cout<<"No"<<endl;
        else
        cout<<"Yes"<<endl;
    }
}      

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