prolo

?- L1 = [7,9,4,5,6], L2 = [1,2,3,4,5,6], ( append(X,Y,L1), append(X1, Y1, L2) ), ((X = Y1, X = [_,_,_]) ; (X = X1, X = [_,_,_]) ; (Y = X1, Y = [_,_,_]) ; (Y =Y1, Y = [_,_,_])).

L1 = [7, 9, 4, 5, 6],
L2 = [1, 2, 3, 4, 5, 6],
X = [7, 9],
Y = Y1, Y1 = [4, 5, 6],
X1 = [1, 2, 3] ;