| a#( b( a( x ) ) ) | → | a#( b( x ) ) | 
Linear polynomial interpretation over the naturals
| [a (x1) ] | = | x1 + 2 | |
| [b (x1) ] | = | x1 + 2 | |
| [a# (x1) ] | = | 2 x1 | |
| [f(x1, ..., xn)] | = | x1 + ... + xn + 1 | for all other symbols f of arity n | 
| none | 
All dependency pairs have been removed.