For now, you will have to accept this as a formation rule for a correct diagram.
2.
Using formation rules, a player could move three to five adjacent figures while using only one action.
3.
In contrast, the string obeys English word-formation rules, but is not a word in English.
4.
As mentioned above, conjugations of some verbs and adjectives differ from the prescribed formation rules because of euphonic changes.
5.
It has a grammar unlike the ( spoken or written ) Russian language, with much stricter word order and word formation rules.
6.
The Oghuz Turks under Sekiz-Oghuz and the Dokuz-Oghuz state formations ruled different areas in the vicinity of the Altay Mountains.
7.
A symbol or string of symbols may comprise a well-formed formula if the formulation is consistent with the formation rules of the language.
8.
"Formation rules " are a precise description of which strings over the alphabet of the formal language which constitute well formed formulas.
9.
The notion of a propositional formula appearing as one of its own variables requires a formation rule that allows the assignment of the formula to a variable.
10.
A formal language is often defined by means of a formal grammar such as a regular grammar or context-free grammar, also called its formation rule.