Twelve columns of .col-md-1

One
Two
Three
Four
Five
Six
Seven
Eight
Nine
Ten
Eleven
Twelve

Thirteen columns

One
Two
Three
Four
Five
Six
Seven
Eight
Nine
Ten
Eleven
Twelve
Thirteen

Twelve columns

One
Two
Three
Four
Five
Six
Seven
Eight
Nine
Ten
Eleven
Twelve