def g={x,y->[(y-x).intdiv(14)*7+7,0].max()}
def cases = [[100,123],[47,23],[40,80],[62,62],[1134,2145]]
cases.each{println g(it[0],it[1])}
ZGVmIGc9e3gseS0+Wyh5LXgpLmludGRpdigxNCkqNys3LDBdLm1heCgpfQoKZGVmIGNhc2VzID0gW1sxMDAsMTIzXSxbNDcsMjNdLFs0MCw4MF0sWzYyLDYyXSxbMTEzNCwyMTQ1XV0KCmNhc2VzLmVhY2h7cHJpbnRsbiBnKGl0WzBdLGl0WzFdKX0=