#include<stdio.h>
main()
{
	char fin[100], fout[100];
	for(int i = 1 ; i <= 5 ; i++ )
	{
		sprintf(fin,".%d.in",i);
		sprintf(fout,".%d.out",i);
		freopen(fin,"r",stdin);
		freopen(fout,"w",stdout);
		int  a;
		scanf("%d",&a);
		printf("%x",a);
	}
}