from math import inf
s = input()
t = input()
# ord()函数，转成ASCII码
# time1 = ord('char2')-ord('char1')
# times = min(time1,26-time1)
n,m = len(t),len(s)
min_times = inf
for i in range(n-m):
    total_t = 0
    for j in range(m):
        t_c = t[i+j]
        s_c = s[j]
        time1 = abs(ord(t_c)-ord(s_c))
        times = min(time1,26-time1)
        total_t += times
    min_times = min(total_t,min_times)
print(min_times)