def Group(x):
    List=[]
    Sum=0
    for i in x:
        List.append(i)
    if len(set(List))==len(List):
        return True
    else:
        CopyList=List.copy()
        for i in set(List):
            CopyList.remove(i)
        for j in CopyList:
            if j*(List.count(j)) in x:
                Sum=0
            else:
                Sum+=1
        if Sum==0:
            return True
N=int(input())
Sum=0
for i in range(N):
    S=input()
    if Group(S)==True:
        Sum+=1
    S=''
print(Sum)

ZGVmIEdyb3VwKHgpOgogICAgTGlzdD1bXQogICAgU3VtPTAKICAgIGZvciBpIGluIHg6CiAgICAgICAgTGlzdC5hcHBlbmQoaSkKICAgIGlmIGxlbihzZXQoTGlzdCkpPT1sZW4oTGlzdCk6CiAgICAgICAgcmV0dXJuIFRydWUKICAgIGVsc2U6CiAgICAgICAgQ29weUxpc3Q9TGlzdC5jb3B5KCkKICAgICAgICBmb3IgaSBpbiBzZXQoTGlzdCk6CiAgICAgICAgICAgIENvcHlMaXN0LnJlbW92ZShpKQogICAgICAgIGZvciBqIGluIENvcHlMaXN0OgogICAgICAgICAgICBpZiBqKihMaXN0LmNvdW50KGopKSBpbiB4OgogICAgICAgICAgICAgICAgU3VtPTAKICAgICAgICAgICAgZWxzZToKICAgICAgICAgICAgICAgIFN1bSs9MQogICAgICAgIGlmIFN1bT09MDoKICAgICAgICAgICAgcmV0dXJuIFRydWUKTj1pbnQoaW5wdXQoKSkKU3VtPTAKZm9yIGkgaW4gcmFuZ2UoTik6CiAgICBTPWlucHV0KCkKICAgIGlmIEdyb3VwKFMpPT1UcnVlOgogICAgICAgIFN1bSs9MQogICAgUz0nJwpwcmludChTdW0p

MQphYmFjYwo=

1
abacc