h, w = list(map(int, input().split()))

s = []



for i in range(h):

    S = list(input().split())

    s.append(S)



for i in range(h):

    for j in range(w):

        if s[i][j] == "snuke":

            l = chr(ord("A") + j)

            print((l + str(i + 1)))

            exit()
h, w = list(map(int, input().split()))



for i in range(h):

    s = input().split()

    for j in range(w):

        if s[j] == "snuke":

            l = chr(ord("A") + j)

            print((l + str(i + 1)))

            exit()
h, w = list(map(int, input().split()))
s = []
for i in range(h):
    S = list(input().split())
    s.append(S)
for i in range(h):
    for j in range(w):
        if s[i][j] == "snuke":
            l = chr(ord("A") + j)
            print((l + str(i + 1)))
            exit()

h, w = list(map(int, input().split()))
for i in range(h):
    s = input().split()
    for j in range(w):
        if s[j] == "snuke":
            l = chr(ord("A") + j)
            print((l + str(i + 1)))
            exit()

-s = [] -    S = list(input().split()) -    s.append(S) -for i in range(h): +    s = input().split() -        if s[i][j] == "snuke": +        if s[j] == "snuke":