I've got the docs but have no way of getting them to you. Here are the Any2 bet string examples from the docs:

A2,XR,1,7/8,e2 .......... XR Race 1 Nos 7 and 8 for $2
A2,SR,7,3 7,e3 .......... SR Race 7 Nos 3 and 7 for $3 Max Spend
A2,PR,1,7 8 9,e3 ........ PR Race 1 Nos 7,8,9 boxed for $3 Max Spend
A2,AR,7,3/7 8 9 10,e50 .. AR Race 7 banker 3 from 7,8,9,10 for $50 Max Spend
A2,VR,9,3/F,e5 .......... VR Race 9 banker 3 from the field for $5 Max Spend
A2,VG,9,F,e5 ............ VG Race 9 boxed the field for $5 Max Spend
A2,AT,12,3 4 7,e15 ...... AT Race 12 boxed 3, 4 and 7 for $15 Max Spend

Have fun!