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this breaks things that should obviously work. take the distributive law: (a|ab)(c|b) and (a|ab)c|(a|ab)b are logically the same pattern - you can verify this yourself by just expanding the terms. but in PCRE, the first matches ab in the input abc, while the second matches abc. two equivalent patterns, two different results.
，更多细节参见体育直播
print u"\u001b[34;1m E \u001b[35;1m F \u001b[36;1m G \u001b[37;1m H \u001b[0m"
Before you buy a mattress, always confirm the store’s and/or mattress company’s warranty in case your mattress becomes damaged, and ask about any return fees or other warranty fine print. The extent of a warranty and what it covers will vary from company to company and mattress store to mattress store.