17\2 - 4- 6- 8- -12- 14- 15- 16......21
17\8 - 4- 6- 12- 14- 15- 16----------18
17\6 - 15- 16---------------------------------6
17\4 - 15 -16-------------------------------6
15\16- 4 -8-----------------------------------6
t0t-----------------59--------------
ristretto-----------18
17\4--- 2- 8
16\17--- 2-6 -8
15\16- 8