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

int main(int argc, char **argv)
{
	FILE *in=stdin;
	FILE *out=stdout;

	while(1)
	{
	    char buf[2];
	    int l=fread(buf,1,1,in);
	    if(l==0)break;
	    buf[l]=0;
	    fwrite(buf,1,l,out);
	}

	return EXIT_SUCCESS;
}