i think if fthr ba age g ab sua ss ava agauy agvbubui gdenh vdeud bdeb dgs gfsg sfujsw shs sb gudsjj suf cask viscous Sufisms
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yes
yes they are same.
It depends on what the name of the initial point is because that defines the direction of the ray. If the initial point is c, then the ray must be called cd, but if the initial point is d, then the ray must be called dc.
No, they are different!
CD and DC