<prompt> Etsa polelo ea regex e sa kenyelletseng mantsoe a nang le tlhaku x.nan  <response>: Instruction in English: Create a regex expression that excludes words containing the letter x. . Response in English: The following regex expression can be used to exclude words containing the letter x case-insensitive:b?!Xxa-zA-ZbThis expression uses a negative lookahead ?! to exclude words containing the letter x or X, and the b word boundaries ensure that it only matches whole words. . Response in Sesotho: Polelo e latelang ea regex e ka sebelisoa ho qhelela ka thoko mantsoe a nang le tlhaku x e sa utloeng letho: b?!Xxa-zA-Zb Sena polelo e sebelisa chebahalo e mpe ?! ho qhelela ka thoko mantsoe a nang le tlhaku x kapa X, me b meeli ea lentsoe e tiisa hore e lumellana le mantsoe a felletseng. 