s = "IGCADRPCDIETRNRYTTMOITSRRCCATOOASPHCWIHRPAOPTIHEYIPMYHLLERTEFLTOEPYEURAIRLIHFNTAISFNOAANAPTOSSEOSNNGDSA"
n = 13
a = ''
for j in range(n):
    for i in range(j, len(s), n):
        a += s[i]
print(a)