The following is a (7,5,4,3)-lotto design with the smallest possible number of blocks: {1,2,3,4,7}       {1,2,5,6,7}       {3,4,5,6,7}.
Схема лото (7,5,4,3) с наименьшим возможным числом блоков: {1,2,3,4,7}       {1,2,5,6,7}       {3,4,5,6,7}.