module X5(output y_out, A, B, input  x, Clk, rst);
    and(JA, B, x);
    not(not1, x);
    buf(KA, not1);
    buf(JB, x);
    not(not2, A);
    and(and1, not2, B);
    or(KB, not1, and1);
    JK_flip_flop JKff1(A, A_N, JA, KA, Clk, rst);
    JK_flip_flop JKff2(B, B_N, JB, KB, Clk, rst);
    and(y_out, A, B);
endmodule

module D_flip_flop(Q, Q_b, D, Clk, rst);
    output Q, Q_b;
    input D, Clk, rst;
    wire nand1, nand2, nand3, nand4;
    nand(nand1, nand4, nand2);
    nand(nand2, nand1, Clk, rst);
    nand(nand3, nand2, Clk, nand4);
    nand(nand4, nand3, D, rst);
    nand(Q, nand2, Q_b);
    nand(Q_b, Q, nand3, rst);
endmodule

module JK_flip_flop(Q, Q_b, J, K, Clk, rst);
    input Clk, rst, J, K;
    output Q, Q_b;
    wire D, and1, and2, not1;
    and(and1, J, Q_b);
    not(not1, K);
    and(and2, Q, not1);
    or(D, and1, and2);
    D_flip_flop DFF1(Q, Q_b, D, Clk, rst);
endmodule