CREATE 1
SIZE
CAPACITY
PUSH_BACK 1
PUSH_BACK 2
PUSH_BACK 3
PUSH_BACK 4
IS_FULL
IS_EMPTY
SIZE
CAPACITY
FRONT
BACK
POP_BACK
FRONT
BACK
POP_BACK
FRONT
BACK
POP_BACK
FRONT
BACK
POP_BACK
IS_FULL
IS_EMPTY
SIZE
CAPACITY
