#include
#include
using namespace std;
int main(){
string s1("this is a test");
string s2("is");
string s3("test");
s1.erase(0, 7);
s1.replace(9, 5, s2);
s1.replace(0, 1, "s");
s1.insert(0, s3);
s1.erase(s1.size()-1, 1);
s1.append(3, '!');
int x = s1.find(' ');
while( x < s1.size() ){
s1.replace(x, 1, "/");
x = s1.find(' ');
}
cout << "s1: " << s1 << endl;
return 0;
}