In this field, type the place notation for the method. The syntax for
place notation is as follows.

`Cross' changes (in which all bells swap) are indicated by
-, X or x.

External places (leading or lying) may be omitted.

Symmetrical pieces of place notation can be indicated by an
ampersand (&) followed by half of the place notation.
For example, &x1x2x3 expands to x1x2x3x2x1x.

Portions of place notation may be separated by commas.