import sys
from collections import defaultdict as DD

D = DD(set)
for i in sys.stdin.read().strip().split('\n'):
    a, b = i.split("-")
    D[a].add(b)
    D[b].add(a)

ans = 0
for (a,B) in D.items():
    for b in B:
        for c in D[b]:
            for d in D[c]:
                if d == a and a!=b and b!=c and c!=a and (a.startswith("t") or b.startswith("t")or c.startswith("t")):
                    ans += 1
print(ans//6)