A string

Question

Hello, please i would like to know if with the word toto as an example wrote by a user, why do i have on my screen : ToTo?

here is my java code:

import java.util.*;

public class Mot {
public static void main(String[] args) {
System.out.println("Write a string :");
Scanner s = new Scanner(System.in);

String word = s.nextLine();
char c = word.charAt(0);

for(int p = 0; p < word.length(); p++) {

if(c >= 'a' && c <= 'z') {
c -= 'a' - 'A';
char nvchar = (char)c;
System.out.println("You have written : " + word.replace(word.charAt(0), nvchar));

}

}
}
}