Given the following set of instantaneous descriptions, what is the most

reasonable definition for $?$

$q_{0}0100|--x{q}_{1}100|--{?}^{**}x100q_1$

$|--x100q_{3}x|--{?}^{**}{q}_{3}x100x|--{?}^{**}x{q}_{4}100x$

$|--xy{q}_{2}00x|--{?}^{**}xy00x{q}_2|--xy00x{q}_{3}y$

$|--{?}^{**}xy{q}_{4}00xy|--xyx{q}_{1}0xy|--{?}^{**}xyx0xy{q}_1$

$|--xyx0xy{q}_{3}x|--{?}^{**}xyx{q}_{4}0xyx|--xy{q}_{1}xyx$

$|--{?}^{**}xyxyx{q}_1|--xyxy{q}_3|--{?}^{**}{q}_{3}xyxy$

$|--{?}^{**}xyxy{q}_4,|--{?}^{**}{q}_{5}xyxy|--q_{6}xyxy$

$|--{?}^{**}01000100q_6|--{?}^{**}{q}_{7}01000100|--q_{8}01000100$

$=\{0,1\}$

$=\{q_0,q_1,q_2,q_3,q_4,q_5,q_6,q_7,q_8\}$

$=\{0,1,\}$

$=\{0,1,x,y,\}$