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

#define BUFSIZE 1000

int main() {
    char buf[BUFSIZE];
    int c, count = 0, i;
    FILE *fpin, *fpout;

    if((fpin = fopen("input1.txt", "r")) == NULL){
        fprintf(stderr, "Failed to open: input1.txt\n");
        exit(1);
    }
    while(count < BUFSIZE && (c = fgetc(fpin)) != EOF){
        buf[count++] = c;
    }
    fclose(fpin);

    if((fpout = fopen("output3.txt", "w")) == NULL){
        fprintf(stderr, "Failed to open: output3.txt\n");
        exit(2);
    }
    for(i = 0; i < count; i++) fputc(buf[i], fpout);
    fputc('\n', fpout);
    for(i = 0; i < count; i++) fputc(toupper((unsigned char)buf[i]), fpout);
    fputc('\n', fpout);
    for(i = count - 1; i >= 0; i--) fputc(buf[i], fpout);
    fputc('\n', fpout);
    fclose(fpout);
    return 0;
}