-1=if (group.getLength()<=12) return 0;else if (group.getLength()<=18) return 0.25;else if (group.getLength()<=28.25) return 0.25;else if (group.getLength()<=38) return 0.31;
1=if (group.getLength()<=12) return 1;else if (group.getLength()<=18) return 0.37;else if (group.getLength()<=28.25) return 0.37;else if (group.getLength()<=38) return 0.46;else return 0;