Each raag has either Madhyam and/or Pancham. Both these notes together can not be absent from a raag.
Two forms of the same note such as Shuddha Gandhar and Komal Gandhar cannot follow each other in succession
(But there are exceptions to this rule). For example Raag Lalit takes Shuddha Madhyam and Teevra Madhyam one after
the other, Raag Jog takes Shuddha Gandhar and Komal Gandhar one after the other.