有没有其他限制，比如lei一定要相连，或可以分开？ lei相连的单词如下：
acrolein aculei buddleia cleidoic cleistogamic cleistogamies
cleistogamous cleistogamy deleing fleishig fraulein gallein
gleization ileitides ileitis kaleidoscope kaleidoscopic
landsleit leis leishmania leister leisure leisureliness
leisures leisurewear leitmotif leitmotiv macronuclei
madeleine mallei marbleise marbleize micronuclei
mullein necropoleis nuclei nuclein oleic olein oleine
phenolphthalein pilei pleiad pleinairism pleinairist
pleiotropic poleis pronuclei sleigh solei spiegeleisen
terreplein tholeiite velleity villein
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