نمونه ورودی و خروجی

sort_name("aabbbcced") ➞ [['b',3],['a',2],['c',2]]

sort_name("qwertyuiopasdfghjklzxcvbnm") ➞ [['a',1],['b',1],['c',1]]

sort_name("tctesvgnclzykpmbcqixlonfidpdjbynrcpxsjmucpeyormenrjbibafpzkquminfnnbizgbpxeovefuykjrcebfnntvyamkgykcnvjqxvnprwrarpcgrjoucywgfnbnysgwzymcxyachlpsglosflsubqhvobedbtzuqmvgyvrpeclcsoeemysuyuejpjtahnrzmebztrjtzhhjtqlmhttxdnjilqsqymmhjmlzikkdzasshfktbfsaozyhaduyqcufucqxxuksnfjaiwacvlyiimfrzyxwobrfoalhmowcobbpwuqpwvlstbngxjrebfnckbcagoacmfuzvmqxefiwqkgfwgghxbulvhqiaqewdmmizjfgyymchohejdpsnnpvmtgqzxkesnrikywoolootuuikapycpxhkrplyuhzhndxckbvaynkzreybomwuemxtgmrjxbysarlsemwambppmrumivznuaqskzgpamfsjwwrjvtwyqpainuyyfmwnegjlmanqwvshvpsbpeykfwykdumdgjlkuwoxwqctihfdwvxrefggsxmjtxmpdcigjertcxwennzyamqpahytneybgmdyupusarhemazvozdqurftdvbnavynrsdzxjebjrdatbkoezdgwznplqqzakozjecyewsidawuxfpusmeusantzdglridxnwvbgwjcaofbplnwyxtmwerskdzwhgxfdqbpfhymlgwtvqeehnnhwgklxqkdjgmfxvuxwwpmnqxsaiitfehhbqdyveqfrqjjfnggmhjrgldgctnhzrrqdtbunxxcuwibqkjdickhrtbznevczqoidnfmtaveysysrgbhctwxmevuutrwyriugtuvhuxkqapfjyplczgekxisffoivofobqmipqxzunlrrtcmaivvhbfjvgywwtqubwszqwjtskyuxljhinqrhcgddejurivukcspaazjjwwloreqlreqjifwsv") ➞ [['m',47],['n',46],['w',46]]