CREATE 1
SIZE
CAPACITY
PUSH_FRONT 1
PUSH_FRONT 2
PUSH_FRONT 3
PUSH_FRONT 4
IS_FULL
IS_EMPTY
SIZE
CAPACITY
FRONT
BACK
POP_FRONT
FRONT
BACK
POP_FRONT
FRONT
BACK
POP_FRONT
FRONT
BACK
POP_FRONT
IS_FULL
IS_EMPTY
SIZE
CAPACITY
