#include <iostream>
#include<windows.h>
using namespace std;
int main()
{
string word,final;
word="Hello World";
for(int i=0;i<word.size();i++){
if(word >='a' && word <='z'){
final.push_back('a');
cout<<final<<endl;
for(char x='b';x<=word ;x++){
final =x;
cout<<final<<endl;
Sleep(40);
}
}
else{
final.push_back(word );
cout<<final<<endl;
Sleep(40);
}
}
return 0;
}

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