The ornamental design for tongs, as shown and described.
FIG. 1 is a right side view of tongs showing our new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a left view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a back view thereof;
FIG. 7 is a perspective view thereof; and,
FIG. 8 is a cross-sectional view thereof taken along line 8-8 in FIG. 1.
The dash-dot-dash broken line in FIG. 1 depicts the cross-sectional cut line and forms no part of the claimed design. The dash-dot-dot-dash broken in FIGS. 5 and 8 illustrate a boundary of the the claim, and the dashed lines and the area within form no part thereof.