def design(family, param):
result = []
for seq in family:
remain = set(family)
remain.remove(seq)
#build GST s1|s2...|sm
tree = SuffixTree(concat(list(remain)))
n = len(seq)
l_min = param[0]
l_max = param[1]
l_t = param[10]
begin = 0
end = n - (l_t + l_min)
forward = find(l_min, l_max, begin, end, seq, tree)
begin = (l_t + l_min)
end = n
reverse = find(l_min, l_max, begin, end, seq, tree)
result.append(bio.design_primer(seq, param, forward, reverse))
return result
