L= set of all binary ending with 100
={100, 0100, 1100, 00100, 01100, 10100, 11100, ... (0+1)*100 }
Prefix : Ԑ, 0, 1, 00, 01, 10, 11, ..... (0+1)*
Complement of prefix: {comp of Ԑ, comp of 0, comp of 1, comp of, 00 ....}
= (0+1)*-{Ԑ} U (0+1)*-{0} U (0+1)* - {1} U (0+1)*-{00} U .....
= (0+1)*