两个字符串重叠部分
s1 = "ao;gjjrkjio;jakld"
s2 = "o;jakldadddsadesadafresfrefijilj;s"
for i in range(len(s1)):
if s1[i] == s2[0]:
s1_sub = s1[i:]
s2_sub = s2[:len(s1_sub)]
if s1_sub == s2_sub:
print(s1_sub)
break
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