#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>

int main() {
	//load input string
	FILE *file = fopen("input", "r");
	if (file == NULL) {
		perror("main: error opening file.");
		return -1;
	}

	//string exclusions
	char *ab = "ab";
	char *cd = "cd";
	char *pq = "pq";
	char *xy = "xy";

	uint32_t ncount = 0;
	uint8_t double_check = 0;
	uint8_t vowel_check = 0;
	char input[256];
	while (fgets(input, sizeof(input), file) != NULL) {
		//string exclusion test
		if (strstr(input, ab) || strstr(input, cd) || strstr(input, pq) || strstr(input, xy)) {
			continue;
		}

		//double letter test
		double_check = 0;
		for (uint8_t i = 0; i < strlen(input); i++) {
			if (input[i] == input[i+1]) {
				double_check = 1;
				break;
			}
		}

		//three vowel test
		vowel_check = 0;
		for (uint8_t i = 0; i < strlen(input); i++) {
		    if (input[i] == 'a' || input[i] == 'e' || input[i] == 'i' || input[i] == 'o' || input[i] == 'u')
				vowel_check++;
		}

		if (double_check == 1 && vowel_check >= 3)
			ncount++;
	}
	if (ferror(file)) {		
		perror("main: error reading file.");
		return -1;
	}

	printf("ncount: %i\n", ncount);
	return 0;
}