else if(!convert_attribute(str, "VERTEX", 2, 4, a, VERTEX2) &&
!convert_attribute(str, "GROUP", 1, 4, a, GROUP1) &&
!convert_attribute(str, "WEIGHT", 1, 4, a, WEIGHT1) &&
else if(!convert_attribute(str, "VERTEX", 2, 4, a, VERTEX2) &&
!convert_attribute(str, "GROUP", 1, 4, a, GROUP1) &&
!convert_attribute(str, "WEIGHT", 1, 4, a, WEIGHT1) &&