#include <stdio.h>
int main(void)
{
char arr[254];
int i = 0;
while (scanf("%c", &arr
[254 - i
]) != EOF
) {
scanf("%c", &arr
[254 - i
]); i++;
}
for (i = 254 - i + 1; i <= 254; i++)
{
}
return 0;
}
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