rename 3 digit

dataset/too_big/too_big_001.JPG

dataset/too_big/too_big_002.JPG

dataset/too_big/too_big_003.JPG

dataset/too_big/too_big_004.JPG

dataset/too_big/too_big_005.JPG

dataset/too_big/too_big_006.JPG

dataset/too_big/too_big_007.JPG

dataset/too_big/too_big_008.JPG

dataset/too_big/too_big_009.JPG

dataset/too_big/too_big_010.JPG

dataset/too_big/too_big_011.JPG

dataset/too_big/too_big_012.JPG

dataset/too_big/too_big_013.JPG

dataset/too_big/too_big_014.JPG

dataset/too_big/too_big_015.JPG

dataset/too_big/too_big_016.JPG

dataset/too_big/too_big_017.JPG

dataset/too_big/too_big_018.JPG

dataset/too_big/too_big_019.JPG

dataset/too_big/too_big_020.JPG