Phrase-structure grammar: Let G = (V, T, S, P), where V = {K, Z, X, Y}; T = {X, Z}, S is the start symbol; P = {Y_XZ, YX_ZZZ, ZZX, Zz_XZX, X_ZXZ_X}.
What is the language generated by G, L(G), which is the set of all strings of terminals that are derivable from the starting state $?