ekiben ekiben ekiben ekiben
ekiben ekiben ekiben ekiben .
e k i b e n WORD_BOUNDARY e k i b e n WORD_BOUNDARY e k i b e n WORD_BOUNDARY e k i b e n WORD_BOUNDARY
e k i b e n WORD_BOUNDARY e k i b e n WORD_BOUNDARY e k i b e n WORD_BOUNDARY e k i b e n WORD_BOUNDARY