package main

import (
	"fmt"

	"internal/util"
)

func main() {
	lines := util.ReadInput()

	twos := 0
	threes := 0
	for _, id := range lines {
		// here we build up a map of letters and counts
		letters := make(map[byte]int)
		for i := 0; i < len(id); i++ {
			letters[id[i]] += 1
		}

		// these are the values to add to the 'twos' and 'threes'
		// count, respectively. They will only ever be 0 or 1.
		add2 := 0
		add3 := 0

		// now we iterate over the map of letter->count, and set
		// add2 and add3 if we find any values equal to 2 or 3
		for _, v := range letters {
			if v == 2 {
				add2 = 1
			}
			if v == 3 {
				add3 = 1
			}
		}

		twos += add2
		threes += add3
	}

	fmt.Println(twos * threes)
}