N2
N2 		N2
N2 		N6
N6 		N6
N6 		N7
N7 		N7
N7 		N12
N12 		N12
N12 		N17
N17 		N17
N17 		N22
N22 		N22
N22 		N27
N27 		N32
N32 		N32
N32 		N36
N36 		N36
N36 		N37
N37 		N37
N37 		N42
N42 		N47
N47 		N47
N47