str1 = input()
str2 = input()
str3 = input()
str4 = input()
str5 = input()
str6 = input()
str7 = input()
str8 = input()
str9 = input()
str10 = input()
vert1 = str1[0] + str2[0] + str3[0] + str4[0] + str5[0] + str6[0] + str7[0] + str8[0] + str9[0] + str10[0]
vert2 = str1[1] + str2[1] + str3[1] + str4[1] + str5[1] + str6[1] + str7[1] + str8[1] + str9[1] + str10[1]
vert3 = str1[2] + str2[2] + str3[2] + str4[2] + str5[2] + str6[2] + str7[2] + str8[2] + str9[2] + str10[2]
vert4 = str1[3] + str2[3] + str3[3] + str4[3] + str5[3] + str6[3] + str7[3] + str8[3] + str9[3] + str10[3]
vert5 = str1[4] + str2[4] + str3[4] + str4[4] + str5[4] + str6[4] + str7[4] + str8[4] + str9[4] + str10[4]
vert6 = str1[5] + str2[5] + str3[5] + str4[5] + str5[5] + str6[5] + str7[5] + str8[5] + str9[5] + str10[5]
vert7 = str1[6] + str2[6] + str3[6] + str4[6] + str5[6] + str6[6] + str7[6] + str8[6] + str9[6] + str10[6]
vert8 = str1[7] + str2[7] + str3[7] + str4[7] + str5[7] + str6[7] + str7[7] + str8[7] + str9[7] + str10[7]
vert9 = str1[8] + str2[8] + str3[8] + str4[8] + str5[8] + str6[8] + str7[8] + str8[8] + str9[8] + str10[8]
vert10 = str1[9] + str2[9] + str3[9] + str4[9] + str5[9] + str6[9] + str7[9] + str8[9] + str9[9] + str10[9]
strings = [str1, str2, str3, str4, str5, str6, str7, str8, str9, str10]
verts = [vert1, vert2, vert3, vert4, vert5, vert6, vert7, vert8, vert9, vert10]
for i in range(len(strings)):
  strings[i] = strings[i].replace(' ', '')
for i in range(len(verts)):
  verts[i] = verts[i].replace(' ', '')
for i in range(len(strings)):
  strings[i] = strings[i].replace('1', ' ')
for i in range(len(verts)):
  verts[i] = verts[i].replace('1', ' ')
stringsspl = []
vertsspl = []
for i in range(len(strings)):
  stringsspl.append(strings[i].split())
for i in range(len(verts)):
  vertsspl.append(verts[i].split())
maxim = 0
for i in stringsspl:
  for j in range(len(i)):
    if len(i[j]) > maxim:
      maxim = len(i[j])
for i in vertsspl:
  for j in range(len(i)):
    if len(i[j]) > maxim:
      maxim = len(i[j])
print(maxim)