public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  HashMap < String , Integer > hm = new HashMap < String , Integer > ( ) ;
  hm . put ( "Tetrahedron" , 4 ) ;
  hm . put ( "Cube" , 6 ) ;
  hm . put ( "Octahedron" , 8 ) ;
  hm . put ( "Dodecahedron" , 12 ) ;
  hm . put ( "Icosahedron" , 20 ) ;
  String str ;
  int sum = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    str = sc . next ( ) ;
    sum = sum + hm . get ( str ) ;
  }
  System . out . println ( sum ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; HashMap < String , Integer > hm = new HashMap < String , Integer > ( ) ; hm . put ( " Tetrahedron " , 4 ) ; hm . put ( " Cube " , 6 ) ; hm . put ( " Octahedron " , 8 ) ; hm . put ( " Dodecahedron " , 12 ) ; hm . put ( " Icosahedron " , 20 ) ; String str ; int sum = 0 ; for ( int i = 0 ; i < n ; i ++ ) { str = sc . next ( ) ; sum = sum + hm . get ( str ) ; } System . out . println ( sum ) ; }
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