On the other hand, whereas 
  
    
      
        
          
            M
          
          
            11
          
        
      
    
    {\displaystyle \mathrm {M} _{11}}
   is sharply 4-transitive, 
  
    
      
        
          
            M
          
          
            12
          
        
      
    
    {\displaystyle \mathrm {M} _{12}}
   is sharply 5-transitive and 
  
    
      
        
          
            M
          
          
            24
          
        
      
    
    {\displaystyle \mathrm {M} _{24}}
   is 5-transitive, and as such they are the only two 5-transitive groups that are not symmetric groups or alternating groups.
It is speculated that children will experience developmental linguistic delays at some point due to their muscle and motor plans not working as quickly as their brains. While they are learning speech, they are also developmentally mastering other skills (walking, potty training, motor skills, etc.) The origin of stuttering is not yet fully understood but parents/adults can mitigate the risk of developmental dysfluency by reducing the conversational demands on their child. Modeling slow, smooth speech and acknowledging the demanding and complex nature of learning language can help. Background
Speech is a complicated achievement that involves a series of cognitive, linguistic, sensorimotor and auditory processes that generate an in-depth understanding of language and speech. As children grow up their language and vocabulary grows with them. However, as this happens it is possible that the child might begin to demonstrate forms of disfluencies in their speech as they struggle to get words out when they are engaged in conversation or speaking in general. Preschool children usually go through a period of dysfluency as they attempt to learn linguistic and speech skills. About 10% of these children will experience a speech or language delay that is serious enough to benefit from early referral and assessment by a speech language pathologist. Normal disfluency begins during a childs intensive language learning years and resolves on its own as the child undergoes growth and development. This is considered the normal phase of language development.