const std = @import("std");

pub fn main() !void {
    const stdin = std.io.getStdIn();
    var buf_io = std.io.bufferedReader(stdin.reader());
    var reader = buf_io.reader();

    var buf = [_]u8{0} ** 1024;
    var total: usize = 0;
    while (try reader.readUntilDelimiterOrEof(&buf, '\n')) |line| {
        const trimmed = std.mem.trim(u8, line, " \n\r\x00");
        if (is_nice(trimmed)) {
            total += 1;
        }
    }

    std.debug.print("{}", .{total});
}

fn is_nice(s: []const u8) bool {
    var vowels: u16 = 0;
    var has_consecutive: bool = false;

    var last_letter: u8 = '_';
    for (s) |c| {
        if (c == last_letter) {
            has_consecutive = true;
        }
        switch (c) {
            'a', 'e', 'i', 'o', 'u' => {
                vowels += 1;
            },
            else => {
                // Check for forbidden sequences
                if ((last_letter == 'a' and c == 'b') or
                    (last_letter == 'c' and c == 'd') or
                    (last_letter == 'p' and c == 'q') or
                    (last_letter == 'x' and c == 'y'))
                {
                    return false;
                }
            },
        }
        last_letter = c;
    }

    return vowels > 2 and has_consecutive;
}

test "day-tests" {
    try std.testing.expectEqual(is_nice("ugknbfddgicrmopn"), true);
    try std.testing.expectEqual(is_nice("aaa"), true);
    try std.testing.expectEqual(is_nice("jchzalrnumimnmhp"), false);
    try std.testing.expectEqual(is_nice("haegwjzuvuyypxyu"), false);
    try std.testing.expectEqual(is_nice("dvszwmarrgswjxmb"), false);
}