I claim the ornamental design for tongs, as shown and described.
FIG. 1 is a top, front perspective view of the tongs showing my new design;
FIG. 2 is a left side view of the tongs shown in FIG. 1;
FIG. 3 is a right side view of the tongs shown in FIG. 1;
FIG. 4 is a front view of the tongs shown in FIG. 1;
FIG. 5 is a back view of the tongs shown in FIG. 1;
FIG. 6 is a top view of the tongs shown in FIG. 1; and,
FIG. 7 is a bottom view of the tongs shown in FIG. 1.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.