species_8 -> species_6
species_2 + species_47 -> species_17 + species_2
species_17 -> species_47
species_17 + species_42 -> species_17 + species_19
species_21 + species_42 -> species_21 + species_7
species_27 + species_7 -> species_3 + species_7
species_22 + species_3 -> species_22 + species_4
species_3 + species_6 -> species_3 + species_8
species_11 + species_28 -> species_2
species_20 + species_41 -> species_21
species_17 + species_7 -> species_17 + species_19
species_19 -> species_1
species_7 -> species_42
species_4 -> species_3
species_3 -> species_27
species_22 -> species_5
species_21 -> species_15
species_4 + species_6 -> species_4 + species_8
species_1 -> species_42
species_15 -> species_20
species_4 + species_9 -> species_10 + species_4
species_2 + species_6 -> species_11 + species_6
species_3 + species_9 -> species_10 + species_3
species_10 -> species_9
species_12 -> species_9
species_2 + species_9 -> species_12 + species_2
species_16 + species_5 -> species_16 + species_22
species_14 + species_3 -> species_14 + species_4
species_14 -> species_13
species_13 + species_21 -> species_14 + species_21
species_18 + species_21 -> species_16 + species_21
species_16 -> species_18