WORKÂ ZONES C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H15 H16 H17 H18 H19 H20