#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>


int main(int argc, const char * argv[]) {
    if(argc < 3) {
        printf("Vlezna i izlezna se vnesuvaat kako argumenti\n");
        return 0;
    }    
    FILE *in = fopen(argv[1], "r");
    FILE *out = fopen(argv[2], "w");
 
    if(in == NULL) {
        printf("Ne validna vlezna datoteka\n");
        return 0;
    }
    if(out == NULL) {
        printf("Ne validna izlezna datoteka\n");
    }
    char s[2000];
    while(fgets(s, 1000, in) != NULL) {
        char zbor[2000];
        int j = 0;
        int ok = 1;
        for(int i = 0; i < strlen(s); i++) {
            if(isspace(s[i])) {
                if(tolower(zbor[0]) != tolower(zbor[j - 1])) {
                    ok = -1;
                    break;
                }
                j = 0;
            }
            else {
                zbor[j] = s[i];
                j++;
            }
        }
        if(ok == 1) {
            fprintf(out, "%s", s);
        }
    }
    return 0;
}


/*
8
1 2 -1 -2 4 3 15  7  2
*/