n=int(input())
s1=['Alice','Ariel','Aurora','Phil','Peter','Olaf','Phoebus','Ralph','Robin' ]
s2=['Bambi','Belle', 'Bolt','Mulan','Mowgli','Mickey','Silver','Simba','Stitch']
s3=['Dumbo','Genie','Jiminy','Kuzko','Kida','Kenai','Tarzan','Tiana','Winnie']
a=s1
k=0
for i in range(n):
    s=input()
    if s in s1:
        if a==s1:
            continue
        elif a==s2:
            k+=1
            a=s1
        elif a==s3:
            k+=2
            a=s1
    elif s in s2:
        if a==s1:
            k+=1
            a=s2
        elif a==s2:
            continue
        elif a==s3:
            k+=1
            a=s2
    elif s in s3:
        if a==s1:
            k+=2
            a=s3
        elif a==s2:
            k+=1
            a=s2
        elif a==s3:
            continue
print(k)

 elif s in s3:
        if a==s1:
            k+=2
            a=s3
        elif a==s2:
            k+=1
            a=s2

Wait, doesn't this letter is sent to block s3, why a = s2?