#!/usr/bin/env bash

declare -A A B C

A['X']=3
A['Y']=4
A['Z']=8

B['X']=1
B['Y']=5
B['Z']=9

C['X']=2
C['Y']=6
C['Z']=7
s=0

while read a b; do
  declare -n elf=$a
  declare -n me=$b
  let s+=$(( ${elf[$b]} ))
done

echo $s