Symmetrical input device

FIG. 1 is a right-side perspective view of a symmetrical input device showing our new design;

FIG. 2 is a left-side perspective view thereof;

FIG. 3 is top plan view thereof;

FIG. 4 is bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is rear elevational view thereof;

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is a left side elevational view thereof.

The elements shown in broken lines form no part of the claimed design.