KeyRelease event, serial 29, synthetic NO, window 0x2a00001,
    root 0x4c, subw 0x0, time 2760801444, (446,280), root:(448,351),
    state 0x0, keycode 87 (keysym 0xffb1, KP_1), same_screen YES,
    XLookupString gives 1 bytes: (31) "1"