Optimize Regular Expressions

Improve search performance for
NFA Regular Expression Engine
NFA: Nondeterministic Finite Automaton
Pass the limitation of Emacs's regexp size.
Regular Expression
            nez|ｎｅｚ|寝|寢|根魚|根崎|寝醒め|根差|根差し|寝惚|寝相|根津|
            禰津|鼠|鼡|鼠色|鼠男|鼠達|鼠取|捻|捩|螺|捻子|螺子|捩子|ネジ|
            捻じ伏|拗|捩じ込み|根占|捩じり鉢巻き|捩り鉢巻き|根城|ねざ|ね
            じ|ねず|ねぜ|ねぞ|ねっ|ネザ|ネズ|ネゼ|ネゾ|ネッ
Optimized Regular Expression
            [寝鼠捻螺寢拗捩鼡]|nez|ね[ざじずぜぞっ]|ネ[ザジズゼゾッ]|
            根[魚差崎城占津]|禰津|ｎｅｚ