#include <stdio.h>
#include <string.h>
#define PAT_LEN 5
int main()
{
char pattern[] = "<unk>";
char replacement[] = "<raw_unk>";
int c;
int buf[PAT_LEN];
int i, j;
for (i = 0; (c = getchar()) != EOF;) {
if (c == pattern[i]) {
buf[i++] = c;
if (i == PAT_LEN) {
printf("%s", replacement);
i = 0;
}
} else {
if (i > 0) {
for (j = 0; j < i; j++) {
putchar(buf[j]);
}
i = 0;
}
putchar(c);
}
}
return 0;
}
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