module buffer (
output Z,
input A);
buf u_buf(Z, A);
endmodule
module gate (
output Z,
input A);
buffer u_buf(Z, A);
endmodule
module buffer (
output Z,
input A);
buf u_buf(Z, A);
endmodule
module gate (
output Z,
input A);
buffer u_buf(Z, A);
endmodule