#include <stdio.h>

char* gets(char *s) {
    int c;
    char *dest = s;
    while ((c = getchar()) != '\n' && c != EOF) {
        *dest++ = c;
    }
    if ( c == EOF && dest == s) {
        return NULL;
    }
    *dest++ = '\0';
    return s;
}

void echo() {
    char buf[8];
    gets(buf);
    puts(buf);
}

int main(void) {
    echo();
}