Preceding text in input data when changing to ASCII in etherscan

Hello guys,

Does anyone know what the preceding text is when changing to the input data to ASCII? My input data was "hello", but I see some characters "¼%âý " before the data. Here is my contract call: https://etherscan.io/tx/0xcde3d50ecfd4137cc42476d32f47dc3144f1b60474ea9185aa55cb49e82f86c3

Thank you!
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