using these relationships, when the user types tgr, the system generates all possible combinations of potential words starting with one of {t,r,f,g,y} as the first letter, one of {g,c,f,t,y,h,b,v} as the second letter, and one of {r,e,d,f,t} as the third letter. how many possible combinations (potential words) are there that can be formed this way?
