ws = [w.strip().lower() for w in input().split(",")]
print(sum(1 for w in ws if len(w)>0 and w[0]==w[-1]))
d3MgPSBbdy5zdHJpcCgpLmxvd2VyKCkgZm9yIHcgaW4gaW5wdXQoKS5zcGxpdCgiLCIpXQpwcmludChzdW0oMSBmb3IgdyBpbiB3cyBpZiBsZW4odyk+MCBhbmQgd1swXT09d1stMV0pKQ==
S29rLGtlbWUsYWxtYSxhZ2FzaCwgZW1lbiwgYXJh
Kok,keme,alma,agash, emen, ara