#!/bin/sh
echo "$1" |
  sed 's|\.sync/Archive/\(.\+\)\.[[:digit:]]\+|\1|;
       s|\.sync/Archive/||;
       s|\.stversions/\(.*\)~[[:digit:]]\+-[[:digit:]]\+|\1|;
       s|\.sync-conflict-[[:digit:]]\+-[[:digit:]]\+-[[:alnum:]]\+||'

# TESTING
# echo "1-projects/.sync/Archive/meetings.1.txt
# 1-projects/.sync/Archive/meetings.txt
# data/.stversions/meeting~2020-01
# meeting.sync-conflict-2021-1925-P5K
# meeting.sync-conflict-2021-1925-PRK.txt" |