Hi existing string defined below. a and b mutually hi string must meet one of the following two conditions: 1. a and b are the same. 2. Place a a1 and a2 into two equal length strings, b b1 and b2 into two equal length strings, which substring must meet one of two conditions: a) a1 and a2 and b1 string hi to each other and b2 mutual hi string. b) a1 and a2 and b2 each other hi string hi string and b1 each other. Task: to determine whether a given two strings string hi to each other

xichuan.txt

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