t =""
text = "BBBBX B XBBBB XBB BBBBX B XBBBB XBBB BBBBX XBB XXBBB BX BBBBB BBBBB BBBXX BXXXX BBBBX B XBBBB XBB BBBBB BBXXX XBBBB XBXB BBBBB XXXXB XBBBB BX BBBBX BBXXX XBBBB XBBB BBBBB XXXXB BBBBB BBBBX BBBBB BBBBB BBBXX XXXXX BBBBB XXXXB XBBBB XBB BBBBX B XBBBB XXXBB BBBBX XBB BBBBX BBBBX BBBBB XXXXB XXBBB XXBBB BBBBB XXXXB XBBBB BX BBBBB BBXXX XBBBB BX BBBBX XBB XXBBB BX XBBBB XBBB BBBXX XXXXX BBBBX B XXBBB BX XBBBB XBBB BBBXX BBBBX BBBBX XBB XXBBB BX XBBBB XBBB BBBXX XBB"
for c in text:
	if c == "X":
		t +='B'
	if c == "B":
		t +='X'
	if c == " ":
		t +=' '
print(t)

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