compiler problem with code

[Guest_imported]

I am having a problem with my compiler that will not accept my statements. Everytime I ask the compiler to accept it gives a syntax error, does anyone know what I am doing
wrong? I have written the statement below.

taller (raymond, dorothy)
taller (david, kathryn)
taller (kathryn, dorothy)

taller (X,Z) :- taller (X,Y), taller (Y,Z)

 

[iza]

try adding dots at the end of lines