program espresso;
const MAXN = 20000;
var N,i, ONE,TWO:integer;
    press :longint;
    S : array[1..MAXN] of string;
 
begin
	readln(N);
	for i:=1 to N do  readln(S[i]); 
	press:=0; ONE:=0; TWO:=0;
	for i:=1 to N do 
	               case S[i] of
	                   'espresso'  : ONE:=ONE+1;
	                   'cappuccino'  : ONE:=ONE+1;
	                   'espresso - doppio'  : TWO:=TWO+1;
	                   'affogato' : TWO:=TWO+1;
	                   'dead - eye'  : begin ONE:=ONE+1; TWO:=TWO+1;end;
	                   'irish - coffee'  : TWO:=TWO+1;
	                end;
  press:=press+(ONE+1) div 2 + TWO;
  writeln(press);
end.

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Mwplc3ByZXNzbwplc3ByZXNzbyAtIGRvcHBpbwpjYXBwdWNjaW5vCgoK

3
espresso
espresso - doppio
cappuccino