#include <stdio.h>
int f(int n) {
int curcit[] = {1, 2, 4, 8, 3, 6, 12, 11, 9, 5, 10, 7};
int sum = 0;
for (int i = 0; i < n; i++)
if (i == 0) sum += 1;
else sum += curcit[(i - 1) % 12];
return sum % 13;
}
int main() {
char ans[] = "rgjgmbuyhbfxc";
for (int i = 0; i < 13; i++)
ans[i] ^= f(13 + i * i * i);
}
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