s = input().split(' ')
for i, bar in enumerate(s):
if i >= len(s) - 2:
break;
if bar[-1] == ',' and (s[i + 2].lower() == 'and' or s[i + 2].lower() == 'or'):
if not s[i + 1][-1] == ',':
s[i+1]+=','
print((' ').join(s))
cyA9IGlucHV0KCkuc3BsaXQoJyAnKQpmb3IgaSwgYmFyIGluIGVudW1lcmF0ZShzKToKCWlmIGkgPj0gbGVuKHMpIC0gMjoKCQlicmVhazsKCWlmIGJhclstMV0gPT0gJywnIGFuZCAoc1tpICsgMl0ubG93ZXIoKSA9PSAnYW5kJyBvciBzW2kgKyAyXS5sb3dlcigpID09ICdvcicpOgoJCWlmIG5vdCBzW2kgKyAxXVstMV0gPT0gJywnOgoJCQlzW2krMV0rPScsJwpwcmludCgoJyAnKS5qb2luKHMpKQoJCgk=