#include <assert.h>
#include <stdio.h>
int main() {
for (int i = 0; i < 2; i++) {
FILE* file = fopen("/sandbox/input.txt", "r");
assert(file != NULL);
char c = fgetc(file);
while (c != EOF) {
int wrote = fputc(c, stdout);
assert(wrote != EOF);
c = fgetc(file);
}
}
}