#!/bin/bash
for A; do
	echo "processing $A"
	dates=$(ls "$A"/*.jpg | xa -n1 exifdate | sort)
	first_date=$(echo "$dates" | head -n1)
	last_date=$(echo "$dates" | tail -n1)
	if [ -n "$first_date" ]; then
		v mv -iv "$A" "${first_date}_${last_date}_$A"
	fi
done