/welcome\*{2,4}to\*{2,4}fenqile$/
/^welcome\*{2,4}to\*{2,4}fenqile$/
/welcome\*{2,4}to\*{2,4}fenqile\*{0,1}/
/^welcome\*{2,4}to\*{2,4}fenqile\*{0,1}$/
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