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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <stdio.h>
int main()
{
int c;
for (;;) {
c = fgetc(stdin);
if (c == '\0')
break;
if (c != -1) {
fputc(c, stdout);
fputc(c, stderr);
fflush(stdout);
fflush(stderr);
}
}
return 0;
}