Go: package main

import (
	"bufio"
	"os"
	"strings"
	"strconv"
	"reflect"
	"fmt"
)

var scanner = bufio.NewScanner(os.Stdin)

func scanBoard() [][]int {
	ret := make([][]int, 8)
	for k := range ret {
		ret[k] = make([]int, 8)
		for l := range ret[k] {
			ret[k][l] = 0
		}
	}
	for i := 0; i < 8; i++ {
		scanner.Scan()
		row := strings.Split(scanner.Text(), "")
		if reflect.DeepEqual(row, []string{}) {
			break
		}
		for j := 0; j < 8; j++ {
			ret[i][j], _ = strconv.Atoi(row[j])
		}
	}
	return ret
}

var emptyBoard = [][]int{{0,0,0,0,0,0,0,0},
						 {0,0,0,0,0,0,0,0},
						 {0,0,0,0,0,0,0,0},
	                     {0,0,0,0,0,0,0,0},
	                     {0,0,0,0,0,0,0,0},
	                     {0,0,0,0,0,0,0,0},
	                     {0,0,0,0,0,0,0,0},
	                     {0,0,0,0,0,0,0,0}}

func main() {
	for {
		var board [][]int
		var ans string
		if board = scanBoard(); reflect.DeepEqual(board, emptyBoard) {
			break
		}
		// fmt.Println(board)
		for i := 0; i < 7; i++ {
			for j := 0; j < 7; j++ {
				if board[i][j] == 1 && board[i+1][j] == 1 && board[i][j+1] == 1 && board[i+1][j+1] == 1 {
					ans = "A"
				}
			}
		}
		for i := 0; i < 5; i++ {
			for j := 0; j < 8; j++ {
				if board[i][j] == 1 && board[i+1][j] == 1 && board[i+2][j] == 1 && board[i+3][j] == 1 {
					ans = "B"
				}
			}
		}
		for i := 0; i < 8; i++ {
			for j := 0; j < 5; j++ {
				if board[i][j] == 1 && board[i][j+1] == 1 && board[i][j+2] == 1 && board[i][j+3] == 1 {
					ans = "C"
				}
			}
		}
		for i := 0; i < 6; i++ {
			for j := 0; j < 7; j++ {
				if board[i][j+1] == 1 && board[i+1][j] == 1 && board[i+1][j+1] == 1 && board[i+2][j] == 1 {
					ans = "D"
				}
			}
		}
		for i := 0; i < 7; i++ {
			for j := 0; j < 6; j++ {
				if board[i][j] == 1 && board[i][j+1] == 1 && board[i+1][j+1] == 1 && board[i+1][j+2] == 1 {
					ans = "E"
				}
			}
		}
		for i := 0; i < 7; i++ {
			for j := 0; j < 6; j++ {
				if board[i][j+1] == 1 && board[i][j+2] == 1 && board[i+1][j] == 1 && board[i+1][j+1] == 1 {
					ans = "G"
				}
			}
		}
		for i := 0; i < 6; i++ {
			for j := 0; j < 7; j++ {
				if board[i][j] == 1 && board[i+1][j] == 1 && board[i+1][j+1] == 1 && board[i+2][j+1] == 1 {
					ans = "F"
				}
			}
		}
		fmt.Println(ans)
	}
}

Python: def trim(N):
    num=[]
    for x in range(8):
        for y in range(8):
            if N[y][x]=="1":
                if not num:
                    refer=(x,y)
                num.append((x,y))
    num=[(x-refer[0],y-refer[1]) for x,y in num]
    return num
def points(point):
    if point==[(0,0),(0,1),(1,0),(1,1)]:print("A")
    if point==[(0,0),(0,1),(0,2),(0,3)]:print("B")
    if point==[(0,0),(1,0),(2,0),(3,0)]:print("C")
    if point==[(0,0),(0,1),(1,-1),(1,0)]:print("D")
    if point==[(0,0),(1,0),(1,1),(2,1)]:print("E")
    if point==[(0,0),(0,1),(1,1),(1,2)]:print("F")
    if point==[(0,0),(1,-1),(1,0),(2,-1)]:print("G")
while True:
    try:
        N=[input() for _ in range(8)]
        points(trim(N))
    except:break

Python: from __future__ import (division, absolute_import, print_function,
                        unicode_literals)
from sys import stdin

def judge(height, indexes):
    if height == 1:
        return 'C'
    if height == 4:
        return 'B'
    idx0, idx1 = indexes
    if height == 2:
        return 'EAG'[1+idx0-idx1]
    if height == 3:
        return 'FD'[idx0-idx1]

while True:
    it = (stdin.readline() for _ in xrange(8))
    L = [line for line in it if line.count('1')]
    indexes = (L[i].index('1') for i in xrange(2))
    print(judge(len(L), indexes))
    if not stdin.readline():
        break

Python: def trim():
    num=[]
    N=[input() for _ in range(8)]
    for x in range(8):
        for y in range(8):
            if N[y][x]=="1":
                if not num:
                    refer=(x,y)
                num.append((x,y))
    num=[(x-refer[0],y-refer[1]) for x,y in num]
    return num
def point(point):
    if point==[(0,0),(0,1),(1,0),(1,1)]:print("A")
    if point==[(0,0),(0,1),(0,2),(0,3)]:print("B")
    if point==[(1,0),(2,0),(3,0),(4,0)]:print("C")
    if point==[(0,0),(0,1),(1,-1),(1,0)]:print("D")
    if point==[(0,0),(1,0),(1,1),(2,1)]:print("E")
    if point==[(0,0),(0,1),(1,1),(1,2)]:print("F")
    if point==[(0,0),(1,-1),(1,0),(2,-1)]:print("G")
while True:
    try:
        point(trim)
    except:break

Python: N = 8
while True:
    A = []
    for i in range(N):
        A.append(input())

    x1 = -1
    y1 = -1
    for i in range(N):
        for j in range(N):
            if x1 == -1 and A [i] [j] == '1':
                y1 = i
                x1 = j
            elif A [i] [j] == '1':
                y2 = i
                x2 = j

    if x2 - x1 == 1 and y2 - y1 == 1:
        print('A')
    elif x2 - x1 == 0 and y2 - y1 == 3:
        print('B')
    elif x2 - x1 == 3 and y2 - y1 == 0:
        print('C')
    elif x2 - x1 == -1 and y2 - y1 == 2:
        print('D')
    elif x2 - x1 == 2 and y2 - y1 == 1:
        print('E')
    elif x2 - x1 == 1 and y2 - y1 == 2:
        print('F')
    else:
        print('G')
    try:
        input()
    except EOFError:
        break

Python: import sys
line=[]
in_line=sys.stdin
for _in in in_line:line.append(_in)
#for i in range(89):line.append(input())
sets=(len(line)+1)//9
for i in range(sets):
    flag=0
    topindex=-1
    for j in range(i*9,i*9+9):
        a=line[j].count('1')
        if a!=0:t=line[j].index('1')
        else:t=-1
        if a==4:
            print('C')
            break
        elif flag==0 and a!=0:
            topindex=t
            if a==1:flag=1
            elif a==2:flag=2
        elif flag==1:
            if a==1:
                print('B')
                break
            elif a==2:
                if topindex==t:
                    print('F')
                    break
                else:
                    print('D')
                    break
        elif flag==2:
            if topindex==t:
                print('A')
                break
            elif topindex<t:
                print('E')
                break
            else:
                print('G')
                break

Python: while True:
    try:
        Map = []
        Base = []
        End = []
        for i in range(8):
            Map.append(list(map(str,input())))
        for i in range(8):
            if Base == []:
                
                for j in range(8):
                    if Map[i][j] == '1':
                        Base = [j,i]
                        break
            else:
                break
        for i in range(7,-1,-1):
            if End == []:
                for j in range(7,-1,-1):
                    if Map[i][j] == '1':
                        End = [j,i]
                        break
            else:
                break
        Yoko = End[0] - Base[0]
        Tate = End[1] - Base[1]
        if Tate == 1 and Yoko == 1:
            print("A")
        elif Yoko == 0 and Tate == 3:
            print("B")
        elif Tate == 0 and Yoko == 3:
            print("C")
        elif Yoko == -1 and Tate == 2:
            print("D")
        elif Yoko == 2 and Tate == 1:
            print("E")
        elif Yoko == 1 and Tate == 2:
            print("F")
        elif Tate == 1 and Yoko == 0:
            print("G")
            
            
    except EOFError:
        break

Python: shapes = {
    'A': '1100000011',
    'B': '1000000010000000100000001',
    'C': '1111',
    'D': '01000000110000001',
    'E': '11000000011',
    'F': '100000001100000001',
    'G': '0110000011'
}

while True:
    try:
        plane = ''
        for i in range(8):
            plane += input()

        for name in shapes:
            try:
                plane.index(shapes[name])
                print(name)
                break
            except:
                pass

        input()
    except:
        break