import re
a=97
regex = r"\S(?: \S)*"
test_str = "a b d d c"
matches = re.findall(regex, test_str)
chars = list(map(chr, range(a, a+len(matches))))
print(dict(zip(chars, matches)))
aW1wb3J0IHJlCgphPTk3CnJlZ2V4ID0gciJcUyg/OiBcUykqIgp0ZXN0X3N0ciA9ICJhICAgIGIgZCBkICBjIgptYXRjaGVzID0gcmUuZmluZGFsbChyZWdleCwgdGVzdF9zdHIpCmNoYXJzID0gbGlzdChtYXAoY2hyLCByYW5nZShhLCBhK2xlbihtYXRjaGVzKSkpKQpwcmludChkaWN0KHppcChjaGFycywgbWF0Y2hlcykpKQ==