Question: Write code that identifies the very first item that recurs in the string. Then return the identified item with the index where it first appeared

Write code that identifies the very first item that recurs in the string. Then return the identified item with the index where it first appeared and the very next index where it reoccurred. # for example: input="DXTDXTXDTXD", output={"D": [0, 3]} input="Abssbd", output={"b": [1, 4]} x="ABABAAAECX" , output = ??

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