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

int main() {
    char c;
    FILE *fpin, *fpout;

    if((fpin = fopen("input1.txt", "r")) == NULL){
        fprintf(stderr, "Failed to open: input1.txt\n");
        exit(1);
    }
    if((fpout = fopen("output1b.txt", "w")) == NULL){
        fprintf(stderr, "Failed to open: output1b.txt\n");
        fclose(fpin);
        exit(2);
    }
    while(fscanf(fpin, "%c", &c) == 1){
        printf("%c", c);
        fputc(c, fpout);
    }
    fclose(fpin);
    fputc('\n', fpout);

    if((fpin = fopen("input1.txt", "r")) == NULL){
        fprintf(stderr, "Failed to open: input1.txt\n");
        fclose(fpout);
        exit(3);
    }
    while(fscanf(fpin, "%c", &c) == 1){
        fputc(tolower(c), fpout);
    }
    fclose(fpin);
    fclose(fpout);
    return 0;
}