#!/bin/bash

s=("b" "я" "Σ" "ä")
p=("\<x" "x\>" "\bx" "x\b" "x\B" "\Bx" "\w" " \W")

dotest() {
	echo "$1" | LC_ALL=en_US.UTF-8 grep -q "$2"
	echo -n "   $?"
}

echo "    ${p[@]}"
for c in "${s[@]}"; do
	echo -n "$c:"
	for t in "${p[@]}"; do
		dotest "$c" $(echo "$t" | sed "s/x/$c/g")
	done
	echo
done