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2988(mined)S 10 R 3260(are)S 3409(allowed.)S 3803(In)S (addition,)354 3912 A 4291(+)S 4373(can)S 4538(be)S 4658(used)S 4867(instead)S 5177(of)S 3648 V 10 Y 1080(*)S 10 R 1158(to)S 1264(mean)S 1510(1)S 1588(or)S 1700(more)S 1935(occurrences,)S 2470(?)S 2543(can)S 2711(be)S 2834(used)S 3046(to)S 3152(mean)S 3398(0)S 3476(or)S 3588(1)S 3666(occurrences,)S 4201(and)S 4374(|)S 4422(can)S 4590(be)S 4713(used)S 4925(between)S 3768 V 1080(two)S 1260(regular)S 1575(expressions)S 2073(to)S 2180(mean)S 2427(either)S 2686(one)S 2860(of)S 2973(them.)S 3253(Parentheses)S 3757(can)S 3925(be)S 4048(used)S 4260(for)S (grouping.)387 4406 A 4846(If)S 4942(a)S 5015(match)S 3888 V 1080(is)S (found,)259 1173 A 1458(exit)S 1635(status)S 1890(0)S 1966(is)S 2059(returned.)S 2472(If)S 2567(no)S 2694(match)S 2967(is)S (found,)259 3061 A 3347(exit)S 3525(status)S 3781(1)S 3858(is)S 3952(returned.)S 4365(If)S 4460(an)S 4582(error)S 4806(is)S 4900(detected,)S 4008 V 1080(exit)S 1256(status)S 1510(2)S 1585(is)S 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