graph G { c [shape=circle]; n_1 [shape=box]; n_2 [shape=ellipse]; n_3 [shape=oval]; n_4 [shape="point"]; n_5 [shape="egg"]; n_6 [shape="triangle"]; n_7 [shape="plaintext"]; n_8 [shape="diamond"]; n_9 [shape="trapezium"]; n_10 [shape="parallelogram"]; n_11 [shape="house"]; n_12 [shape="pentagon"]; n_13 [shape="hexagon"]; n_14 [shape="septagon"]; n_15 [shape="square"]; n_16 [shape="star"]; c -- n_1 [label="box"]; c -- n_2 [label="ellipse"]; c -- n_3 [label="oval"]; c -- n_4 [label="point"]; c -- n_5 [label="egg"]; c -- n_6 [label="triangle"]; c -- n_7 [label="plaintext"]; c -- n_8 [label="diamond"]; c -- n_9 [label="trapezium"]; c -- n_10 [label="parallelogram"]; c -- n_11 [label="house"]; c -- n_12 [label="pentagon"]; c -- n_13 [label="hexagon"]; c -- n_14 [label="septagon"]; c -- n_15 [label="square"]; c -- n_16 [label="star"]; }