aaronNGi

#!/usr/bin/env bash
mapfile -t words < <(grep -x '[a-z]\{5\}' "${WORDLIST:-/usr/share/dict/words}")
word=${words[RANDOM % ${#words[@]}]} pool=abcdefghijklmnopqrstuvwxyz
for ((round=1; round <= ${ROUNDS:=6}; round++)); do
	while read -rp "$round/$ROUNDS: " guess || exit 1; do
		[[ " ${words[@]} " == *" ${guess,,} "* ]] && guess=${guess,,} && break
	done
	for ((i=0, chars=0; i < ${#word}; i++)); do
		[[ ${word:i:1} != ${guess:i:1} ]] && chars+=${word:i:1}
	done