批量修改文件名-文件名添加前后缀及去掉前后n个字符

53889.TXT 53898.TXT 53972.TXT 53974.TXT 53978.TXT 53979.TXT 53983.TXT 53984.TXT 53985.TXT 53986.TXT 53987.TXT 53988.TXT 53989.TXT 53991.TXT 53992.TXT 53993.TXT 53994.TXT 53995.TXT 53997.TXT 53998.TXT 54817.TXT 54900.TXT 54901.TXT 54902.TXT 54903.TXT 57051.TXT 57056.TXT 57063.TXT 57065.TXT 57066.TXT 57067.TXT 57070.TXT 57071.TXT 57072.TXT 57074.TXT 57075.TXT 57076.TXT 57077.TXT 57078.TXT 57079.TXT 57080.TXT 57082.TXT 57085.TXT 57086.TXT 57087.TXT 57088.TXT 57089.TXT 57090.TXT 57091.TXT 57093.TXT 57094.TXT 57095.TXT 57096.TXT 57098.TXT 57099.TXT 57156.TXT 57162.TXT 57169.TXT 57173.TXT 57175.TXT 57176.TXT 57179.TXT 57180.TXT 57181.TXT 57182.TXT 57183.TXT 57184.TXT 57185.TXT 57187.TXT 57188.TXT 57189.TXT 57191.TXT 57192.TXT 57193.TXT 57194.TXT 57196.TXT 57197.TXT 57198.TXT 57261.TXT 57271.TXT 57273.TXT 57274.TXT 57281.TXT 57285.TXT 57292.TXT 57293.TXT 57294.TXT 57295.TXT 57296.TXT 57298.TXT 57299.TXT 57396.TXT 58001.TXT 58004.TXT 58006.TXT 58007.TXT 58008.TXT 58017.TXT 58100.TXT 58101.TXT 58104.TXT 58111.TXT 58205.TXT 58207.TXT 58208.TXT 58301.TXT