Answer:
X = {O,B,A,N,D}
Y = {B,U,L,A,C,N}
Explanation:
Given
Words: OBANDO and BULACAN,
Such that X and represent either of those words respectively.
Next, is to remove all repetition and assign X and Y to the words as thus:
X = {O,B,A,N,D}
Y = {B,U,L,A,C,N}