vex_dict = {
    0: VR0, 1: VR1, 2: VR2, 3: VR3, 4: VR4, 5: VR5, 6: VR6, 7: VR7, 8: VR8,
    9: VR9, 10: VR10, 11: VR11, 12: VR12, 13: VR13, 14: VR14, 15: VR15, 16: VR16,
    17: VR17, 18: VR18, 19: VR19, 20: VR20, 21: VR21, 22: VR22, 23: VR23, 24: VR24,
    25: VR25, 26: VR26, 27: VR27, 28: VR28, 29: VR29, 30: VR30, 31: VR31,