30
csfnbdddnbqznb
csfndddb
csfndddnb
nb
bnnbnnb
csfnb
csfnbnb
nbcsfnb
nbcsf
csfnbcsfnb
nbnb
nbnbnb
nnbnb
nnnnbbnbb
nnnnnbbnbbnb
nbbnnbnb
bnbbnbbnb
bbnbbb
nnnnnnnnb
nnnbnnnnnnnnnnnnnnnnnnnnnb
csfnbcsfnbcsfnbcsfnbcsfnb
csfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnb
csfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnb
csfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnbcsfnb
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanb
nnbbnbnnbbnbbnbbnbbnbnnbnnbbnbnnbbnbbnbbnbbnbnnbnnbbnbnnbbnbbnbbnbbnbnnb
ahdudsdnbsdfsdfdnbsdsdfdnbifufhsefnbxxxxxxnbsodijsnbsnfdfdndvjhbfbdndfvifbbdibunfibdnbidbnfndinbidnb
ergrgiugrnbiufhiddufidfhdifdhsdisdnb
vbjhvnmbnvnbvbnmvbnvbvnbmvnbbvmnbvmnbmvbnmvnbm
nbvbnmvnmnbnvmnmvmnvnnvnbmvbnbnb