#include <stdio.h>

//solution of ErikF for comparison
i;f(char*a){for(i=*a;*++a;i^=*a&1?0:23);return i;}


g(char*a){return*a?"yn"[g(a+1)+*a&1]:1;}


int main(void) {
	const char * x = "yynynynynyyn";
	const char * y = "yynn";
	const char *z = "yyy";
	printf("%c %c %c\n", f(x), f(y), f(z));
	printf("%c %c %c\n", g(x), g(y), g(z));
	return 0;
}