The list of inputs:
mp_left_sip,
mp_left_puff,
mp_center_sip,
mp_center_puff,
mp_right_sip,
mp_right_puff,
mp_left_center_sip,
mp_left_center_puff,
mp_right_center_sip,
mp_right_center_puff,
mp_left_right_sip,
mp_left_right_puff,
mp_triple_sip,
mp_triple_puff,
mp_left_sip_soft,
mp_left_puff_soft,
mp_center_sip_soft,
mp_center_puff_soft,
mp_right_sip_soft,
mp_right_puff_soft,
mp_left_center_sip_soft,
mp_left_center_puff_soft,
mp_right_center_sip_soft,
mp_right_center_puff_soft,
mp_left_right_sip_soft,
mp_left_right_puff_soft,
mp_triple_sip_soft,
mp_triple_puff_soft,
right_sip,
right_puff,
right_sip_soft,
right_puff_soft,
right_sip_long,
right_puff_long,
lip,
lip_soft,
left,
right,
up,
down,
any_direction,
N,
NE,
E,
SE,
S,
SW,
W,
NW,
N_inner,
NE_inner,
E_inner,
SE_inner,
S_inner,
SW_inner,
W_inner,
NW_inner,
usb_1_left,
usb_1_right,
usb_1_up,
usb_1_down,
usb_1_N,
usb_1_NE,
usb_1_E,
usb_1_SE,
usb_1_S,
usb_1_SW,
usb_1_W,
usb_1_NW,
usb_1_N_inner,
usb_1_NE_inner,
usb_1_E_inner,
usb_1_SE_inner,
usb_1_S_inner,
usb_1_SW_inner,
usb_1_W_inner,
usb_1_NW_inner,
usb_2_left,
usb_2_right,
usb_2_up,
usb_2_down,
usb_2_N,
usb_2_NE,
usb_2_E,
usb_2_SE,
usb_2_S,
usb_2_SW,
usb_2_W,
usb_2_NW,
usb_2_N_inner,
usb_2_NE_inner,
usb_2_E_inner,
usb_2_SE_inner,
usb_2_S_inner,
usb_2_SW_inner,
usb_2_W_inner,
usb_2_NW_inner,
usb_1_button_1,
usb_1_button_2,
usb_1_button_3,
usb_1_button_4,
usb_1_button_5,
usb_1_button_6,
usb_1_button_7,
usb_1_button_8,
usb_1_button_9,
usb_1_button_10,
usb_1_button_11,
usb_1_button_12,
usb_1_button_13,
usb_1_button_14,
usb_1_button_15,
usb_2_button_1,
usb_2_button_2,
usb_2_button_3,
usb_2_button_4,
usb_2_button_5,
usb_2_button_6,
usb_2_button_7,
usb_2_button_8,
usb_2_button_9,
usb_2_button_10,
usb_2_button_11,
usb_2_button_12,
usb_2_button_13,
usb_2_button_14,
usb_2_button_15,
digital_in_1,
digital_in_2,
digital_in_3,
digital_in_4,
digital_in_5,
digital_in_6,
digital_in_7,
digital_in_8
center,
constant,
