#include <stdlib.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>

int main() {
    FILE *file = fopen("data.txt", "r");
    if(file == NULL) {
        fprintf(stderr, "%s\n", strerror(errno));
        exit(1);
    }
    char buffer[128];
    int month;
    int day;
    int hour;
    int minute;
    int number;
    char mock;
    while(fgets(buffer, sizeof(buffer), file) != NULL) {
        if(sscanf(buffer, "[1518-%d-%d %d:%d] falls asleep%c", &month, &day, &hour, &minute, &mock) == 5 && mock == '\n') {
            printf("[1518-%d-%d %d:%d] falls asleep\n", month, day, hour, minute);
            continue;
        }
        if(sscanf(buffer, "[1518-%d-%d %d:%d] wakes up%c", &month, &day, &hour, &minute, &mock) == 5 && mock == '\n') {
            printf("[1518-%d-%d %d:%d] wakes up\n", month, day, hour, minute);
            continue;
        }
        if(sscanf(buffer, "[1518-%d-%d %d:%d] Guard #%d begins shift%c", &month, &day, &hour, &minute, &number, &mock) == 6 && mock == '\n') {
            printf("[1518-%d-%d %d:%d] Guard #%d begins shift\n", month, day, hour, minute, number);
            continue;
        }
        printf("Zły format lini\n");
    }
    fclose(file);
}