Help me in solving DEBUGCL9 problem

My issue

explain the statement “%c%c%c\n”…

My code

#include <stdio.h>

int main() {
    char s[100];  // Assuming a maximum string length of 100 characters
    scanf("%s", s);  // Input string

    // Check if the string has at least 7 characters
    if (strlen(s) >= 7) {
        printf("%c%c%c\n", s[1], s[4], s[6]);
    } else {
        printf("Input string is too short\n");

    return 0;

Learning course: Learn C
Problem Link: CodeChef: Practical coding for everyone

%c is the character format specifier .
and \n is used the leave line .