PY
py
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#https://www.sololearn.com/Discuss/850718/?ref=app
for i in range(14):
print(sum(range(i if i < 8 else 14 - i)) * "{}".format("-" if 5 < i < 9 else "."))
# see explanation at https://code.sololearn.com/cQbf68JWJ2r7/?ref=app
Enter to Rename, Shift+Enter to Preview
OUTPUT
Run