1: | f(f(a,b),x) | → f(a,f(a,x)) | |
2: | f(f(b,a),x) | → f(b,f(b,x)) | |
3: | f(x,f(y,z)) | → f(f(x,y),z) | |
4: | F(f(a,b),x) | → F(a,f(a,x)) | |
5: | F(f(a,b),x) | → F(a,x) | |
6: | F(f(b,a),x) | → F(b,f(b,x)) | |
7: | F(f(b,a),x) | → F(b,x) | |
8: | F(x,f(y,z)) | → F(f(x,y),z) | |
9: | F(x,f(y,z)) | → F(x,y) | |