is_ok = ''
if is_ok:
    print('ok!')
else:
    print('No')

a269e26ec162720dc7a078d7d66b2d431b75c807
<mask token>

<mask token>
if is_ok:
    print('ok!')
else:
    print('No')

is_ok = ''
if is_ok:
    print('ok!')
else:
    print('No')
