第六十九条 托运人应当及时向港口、海关和其他主管机关办理货物运输所需要的各项手续，并将已办理各项手续的单证送交承运人；因办理各项手续不及时、不完备或者不正确，使承运人的利益受到损害的，托运人应当承担赔偿责任。
what substrings does the regex (a|ab)+ match in the following input?
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In most cases, it’s as simple as making sure that types, interfaces, classes, methods and functions that should not be used outside of the module have internal or private access scope. The compiler (or interpreter) will make sure that users won’t break encapsulation. Alternatively, for small and medium modules, you can prepare a facade object that will be used as an entrypoint to the module.