An answer, a simple programming language sorting problem is C. ■ Enter a title length less than 1000 bytes, the only English-byte string containing lowercase letters. Please calculate the output frequency in which each letter appears, from more to less in accordance with the order and output. Asked one letter each line of output, and the same number of times when the letters appear, alphabetically output. ■ Example ① Input: abbccc output: cba ■ case ② Input: bcagggqhhhtlllopppiacb Output: ghlpabcioqt

letter_order.c

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