include<bits/stdc++.h>

using namespace std; int main(){

int x,l;
string a;
string b;
cin>>a;
cin>>x;
cin>>b;
l=a.size();
if(l<100){
	cout<<l<<endl;
}else{
	cout<<100<<endl;
}
x=x-1;
a.insert(x,b);
cout<<a<<endl;
reverse(a.begin(),a.end());
for(int i=0;i<l;i++){
	if(a[i]=='x'){
		int t=i;
		t++;
		cout<<t;
	}
}
	return 0;

}