#include<stdio.h>
#include<string.h>
int main() {
    char username[21], password[21], role[21];
    if (scan("%20s %20s", username, password) !=2) {
        printf("invalid input");
        return 0;
    }
    if (scan("%20s", role) != 1) {
        printf("invalid input");
        return 0;
    }
    if (trlen(username) == 0 || strlen(password) == 0 || strlen(role) ) {
        printf("invalid input");
        return 0;
    }
    printf("%s\n$s", username, role);
    return 0;
}