#include <stdio.h>
int main(void){
    int c;
    c = getchar();
    while ( c != EOF ) {
        switch (c) {
        case 0x0a:
            putchar(0x0d);
            putchar(0x0a);
            break;
        case 0x09:
            putchar(0x20);
            putchar(0x20);
            putchar(0x20);
            putchar(0x20);
            break;
        default: putchar(c);
        }
        c = getchar();
    }
}