f =lambda x:'%x'%(`[''.join('%x'%int(s[i:i+4],2)for s in x)for i inrange(9)]`.find('beef')+15)
for x in['111001111110','110100100000','010001111101','100100100100','100101100111','111111000010','110111000001','100111100001','100111011111','111110011111','100001010111','110011000011'],['010011000110','110000100011','010111100100','111110011101','011101110010','000101111011','101100111010','101101101110','010111001000','010111001111','110111101101','001001111001'],['101011101100','000011001110','000010010100','001011111011','000110101101','010011111010','100001111010','100110111111','000000101010','011001101110','000101101011','010001111001'],['110110011110','110110101110','011101011010','011101011110','011111010011','010110100010','100101001111','101011111000','010110001000','011110000011','101000110101','001000000111'],['111001001101','100101001110','100010100000','011000101111','011101001001','111110000001','101100110000','110000000010','000111011011','100101001110','011100101110','000001111111'],['000101101001','010011111011','110011101000','101100111110','111010010101','111011111001','111110000011','110101001101','101101000110','000111000000','110000011101','000000010110'],['111001011010','101100100100','011000100011','110111111110','010101111010','110100000011','011011001101','101001110110','100000011100','101001111101','001011011110','000100000101']: