create alias mlm (0) -> male/male (489567)
create alias wlw (0) -> female/female (99878)
create alias male_x_male (0) -> male/male (489567)
create alias female_x_male (0) -> male/female (650581)
create alias male_x_female (0) -> male/female (650581)
create alias female_x_female (0) -> female/female (99878)