declare -a gens_prefix=("pregirone"      "girone"                 "ottavo"            "quarto"      "semi" "finale")
declare -a gens_names=("p1|p2|p3|p4|p5|p6|p7|p8|p9" "a1|a2|a3|a4|a5|a6|a7|a8" "b1|b2|b3|b4|b5|b6" "c1|c2|c3|c4" "d1|d2" "")