(h1) 1

(h2) 1-1

(h2) 1-2

(h3) 1-2-1

(h1) 2

(h2) 2-1

(h2) 2-2

(h3) 2-2-1

(h1) 1

(h2) 1-1

(h2) 1-2

(h3) 1-2-1

(h1) 2

(h2) 2-1

(h2) 2-2

(h3) 2-2-1

(h1) 1

(h2) 1-1

(h2) 1-2

(h3) 1-2-1

(h1) 2

(h2) 2-1

(h2) 2-2

(h3) 2-2-1