FEEEEEE EEEEEEEEEE$EEEEEEEERegexpEE ExpressionEEAnchorEEBaseEEBeginningOfLineEE EndOfLineEEBeginningOfStringEE EndOfStringEEEndOfStringOrBeforeEndOfLineEE WordBoundaryEENonWordBoundaryEE MatchStartEEBOLEEEOLEEBOSEEEOSEEEOSobEOL% ,W|0[+Po.E\