#include <iostream>
#include <string.h>

using namespace std;
class STRING{
    public:
int len;
char *name;

    friend istream & operator>>(istream &,const STRING &);
    friend ostream & operator<<(ostream &,const STRING &);
    void ranswap(string a,string b);
    STRING(){len=0; name= new char[len];}
    STRING (const char *w)
    {
        len=strlen(w);
        name= new char [len+1];
        strcpy(name,w);
    }
    STRING(const STRING &a)
    {
        len=a.len;
        name=new char[len+1];
        strcpy(name,a.name);
    }





};
void STRING :: ranswap(string a,string b)
{   int i,j=0;
    STRING s;
    len=a.size()+b.size();
    name=new char [len+1];
    for(i=0;i<len;i++)
    {
        if(i%2==0)
            s[i]=a.at(j);
        else
            s[i]=b.at(j);
    j++;
    }
    cout <<s;
}
 istream & operator>>(istream &in,const STRING &g)
{  delete [] g.name;

        in>>g.name;
    return (in);
}
 ostream & operator<<(ostream &out,const STRING &k)
{

        out<<k.name;
    return (out);

}

int main()
{
    STRING s="hello";
    STRING a,n,q,h=" ";
    a=s;
    n="hello";
    cout << n;
    q="world";
    h.ranswap(n,q);
    return 0;
}