الحاق (علوم رایانه)

${\displaystyle XY=\{abcc,bbcc,cbcc,acb,bcb,ccb\}}$

${\displaystyle X^0=\{\lambda \}}$

${\displaystyle X^1=X=\{a,b,c\}}$

${\displaystyle X^2=XX=\{aa,ab,ac,ba,bb,bc,ca,cb,cc\}}$

${\displaystyle X^3=XXX=\{aaa,aab,aac,aba,abb,abc,aca,acb,acc,baa,bab,bac,bba,bbb,bbc,bca,bcb,bcc,caa,cab,cac,cba,cbb,cbc,cca,ccb,ccc\}}$