The ornamental design for trousers, as shown an described.
FIG. 1 is a front perspective view of the trousers showing my new design
which is characterized by the two-different colored sections of the
trousers which create the impression that the wearer is wearing chaps;
FIG. 2 is a left side elevational view of the trousers; and,
FIG. 3 is a rear perspective view of the trousers showing my design viewed
from the rear and slightly to the right in order to show the inner leg
details of the left leg, the inner leg details of the right leg which are
not shown being understood to be the same as the inner leg details of the
left leg.