public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  int n = scanner . nextInt ( ) ;
  scanner . nextLine ( ) ;
  int res = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    String poly = scanner . nextLine ( ) . trim ( ) ;
    switch ( poly ) {
      case "Tetrahedron" : res += 4 ;
      break ;
      case "Cube" : res += 6 ;
      break ;
      case "Octahedron" : res += 8 ;
      break ;
      case "Dodecahedron" : res += 12 ;
      break ;
      case "Icosahedron" : res += 20 ;
      break ;
    }
  }
  System . out . println ( res ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; int n = scanner . nextInt ( ) ; scanner . nextLine ( ) ; int res = 0 ; for ( int i = 0 ; i < n ; i ++ ) { String poly = scanner . nextLine ( ) . trim ( ) ; switch ( poly ) { case " Tetrahedron " : res += 4 ; break ; case " Cube " : res += 6 ; break ; case " Octahedron " : res += 8 ; break ; case " Dodecahedron " : res += 12 ; break ; case " Icosahedron " : res += 20 ; break ; } } System . out . println ( res ) ; }
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