text: bill=0
  a=input('Enter pizza size ')
  if(a=='small'):
      bill+=20
  elif(a=='medium'):
      bill+=30
  else:
      bill+=50
  b=input('Do you want pepper and onion? ')
  if(b=='yes'and a=='small'):
      bill+=10
  elif(b=='yes'and a=='medium'):
      bill+=20
  elif(b=='yes'and a=='large'):
      bill+=30
  c=input('Do you want extra Cheese? ')
  if(c=='yes'):
      bill+=10
      print('bill=',bill)
  else:
      print('bill=',bill)
  
  
  
  
  
          
          
      
      
      
      
  