#define M m[y][x]
char**m,*l,i;main(Y,X){for(;scanf("%ms",&l)>0;)(m=realloc(m,Y*8))[Y-1]=l,X=puts(m[Y++-1])-2;puts("");int s(x,y,c,d){(x<0|y<0|y/Y)?:({if(M^'R'&&M^'Y')if(M^'B'||c^2&&!((y&&m[y-1][x]=='Y')|(x&&m[y][x-1]=='Y')|(y<Y-1&&m[y+1][x]=='Y')|(x<X-1&&m[y][x+1]=='Y'))){x^X?:({M='#';return 1;});c=M^'O'?c:2;M^'U'?:({return s(x+(d<4?d-2:0),y+(d>3?d-5:0),1,d)?({M='#';1;}):0;});if(d^1&&s(x+1,y,c,3)||d^4&&s(x,y+1,c,6)||d^6&&s(x,y-1,c,4)||d^3&&s(x-1,y,c,1)){M='#';return 1;}}});return 0;}s(0,--Y/2,0,3);for(;i<Y;)puts(m[i++]);}
 

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UlJSUgpSUFBSClBVT1IKUlBCUA==

RRRR
RPPR
PUOR
RPBP