1,287 Stedman Caters

Robert M Kilby (No 1)
231456789  5 16
214356978    a 
4132       -  2 |A
3124       -  2 |
213654     -  -
213465879    b
4123         A
2143       -  s
a = 2.4.s6.s10.12.13.16 (16)
b = 2.s5.9.16