#!/bin/bash

for testcase in \
	"Aa2 Aaa Aa1" \
	"AA AA- AA+" \
	"Baa1 Ba1 A1 B1 Aaa C Caa Aa1" \
	"BBB+ BB+ A+ B+ AAA C CCC AA+" \
	"B3 B1 B2" \
	"B- B+ B" \
	"B3 Caa Aa1 Caa Ca B3" \
	"B- CCC AA+ CCC CC B-"; do
	printf "%s\n" $testcase | \
sed s/$/e/|tr +-3 d-l|sort|tr -d e|tr d-l +-3

	echo
done