# game intro
print('''
[-] : Empty positions
[P] : Player
[B] : Box
[S] : Storage point
''')
# create map and first moving
m = [["-","-","-","-"] ,
    ["-","P","-","-"] ,
    ["-","-","-","-"] ,
    ["-","-","-","-"] ,
]
for i in m :
    for c in i :
        print(c, end = " ")
    print()

# set location
i = 0
j = 0
P = m[1][1]

b = input("Your next move? ")
while b in ["a", "s", "d", "w"] :
    if b == "a" :
        j -= 1
        P = m[i][j - 1]
        for i in m :
            for c in i :
                print(c, end = " ")
            print()
        b = input("Your next move? ")
    elif b == "s" :
        i += 1
        P = m[i + 1][j]
        for i in m :
            for c in i :
                print(c, end = " ")
            print()
        b = input("Your next move? ")
    elif b == "d" :
        j += 1
        P = m[i][j + 1]
        for i in m :
            for c in i :
                print(c, end = " ")
            print()
        b = input("Your next move? ")
    else :
        i -= 1
        P = m[i - 1][j]
        for i in m :
            for c in i :
                print(c, end = " ")
            print()
        b = input("Your next move? ")