Is there a way I can create multiple sub-labels instead of one by one?I have created the following labels-2015  -January    -3,4    -10,11    -17,18    -24,25  -February    -31,1    -7,8    -14,15    -21,22etc.Each label and sub-label is created individually, which is tedious work! I was wondering if there is a quicker way to add multiple sub-labels all at once, instead of creating one by one by one.
Creating multiple Gmail labels
gmail;gmail labels