#include <iostream>
#include <cstdio>
using namespace std;

int num,dui2[1000000],die;
char dui[1000000][10];

void swap(int& x,int& y)
{
	int temp;
	temp=x;
	x=y;
	y=temp;
}

void assi(void)//Ghost=0; Knife=1; Grenade=2; Bang=3; Miss=4; Parry=5;
{
	int i;
	die=2;
	for (i=0;i<num;i++)
	{
		if (dui[i][0]=='G'&&dui[i][1]=='h')
			dui2[i]=0;
		else if (dui[i][0]=='K')
			dui2[i]=1;
		else if (dui[i][0]=='G'&&dui[i][1]=='r')
			dui2[i]=2;
		else if (dui[i][0]=='B')
			dui2[i]=3;
		else if (dui[i][0]=='M')
			dui2[i]=4;
		else// if (dui[i][0]=='P')
			dui2[i]=5;
	}
}

void play(void)
{
	int i,j,k,hp[2]={4,4},cs[2]={4,4},shou[2][10],poi=0;
	bool f,f2,ed;
	for (i=0;i<4;i++)
		shou[0][i]=dui2[poi++];
	for (i=0;i<4;i++)
		shou[1][i]=dui2[poi++];
	for (i=0;i<=2;i++)
		for (j=0;j<=2-i;j++)
			if (shou[1][j]<shou[1][j+1])
				swap(shou[1][j],shou[1][j+1]);
	for (f=0,f2=1,ed=false;die==2;f=!f,f2=!f2,ed=false)
	{
		/*mo*/
		for (i=0;i<2;i++)
			shou[f][cs[f]++]=dui2[poi++];
		for (i=0;i<=cs[f]-2;i++)
			for (j=0;j<=cs[f]-2-i;j++)
				if (shou[f][j]<shou[f][j+1])
					swap(shou[f][j],shou[f][j+1]);
		/*chu*/
		for (i=cs[f]-1;i>=0;i--)
		{
			if (shou[f][i]==0)
			{
				for (j=cs[f2]-1;j>=0;j--)
					if (shou[f2][j]==3)
						break;
				if (j>=0&&j<cs[f2])
				{
					cs[f2]--;
					for (k=j;k<cs[f2];i++)
						shou[f2][k]=shou[f2][k+1];
				}
				else
				{
					hp[f2]--;
					if (!hp[f2])
					{
						die=f2;
						break;
					}
				}
				cs[f]--;
			}
			else if (shou[f][i]==1)
			{
				hp[f2]--;
					if (!hp[f2])
					{
						die=f2;
						break;
					}
			}
			else if (shou[f][i]==2)
			{
				if (cs[f2]&&shou[f2][0]==4||cs[f2]&&shou[f2][0]==5)
				{
					if (shou[f2][0]==5)
					{
						shou[f2][0]=dui2[poi++];
						for (j=1;j<cs[f2];j++)
							if (shou[f2][0]>=shou[f2][j])
								break;
						j--;
						swap(shou[f2][0],shou[f2][j]);
					}
					else
					{
						cs[f2]--;
						for (j=0;j<cs[f2];j++)
							shou[f2][j]=shou[f2][j+1];
					}
				}
				else
				{
					hp[f2]--;
					if (!hp[f2])
					{
						die=f2;
						break;
					}
				}
				cs[f]--;
			}
			else if (shou[f][i]==3&&!ed)
			{
				ed=true;
				if (cs[f2]&&shou[f2][0]==4||cs[f2]&&shou[f2][0]==5)
				{
					if (shou[f2][0]==5)
					{
						shou[f2][0]=dui2[poi++];
						for (j=1;j<cs[f2];j++)
							if (shou[f2][0]>=shou[f2][j])
								break;
						j--;
						swap(shou[f2][0],shou[f2][j]);
					}
					else
					{
						cs[f2]--;
						for (j=0;j<cs[f2];j++)
							shou[f2][j]=shou[f2][j+1];
					}
				}
				else
				{
					hp[f2]--;
					if (!hp[f2])
					{
						die=f2;
						break;
					}
				}
				cs[f]--;
			}
			else
			{
				/*qi*/
				if (cs[f]>hp[f])
					cs[f]=hp[f];
				break;
			}
		}
	}
}

int main(void)
{
	freopen("bang.in","r",stdin);
	freopen("bang.out","w",stdout);
	bool over=false;
	cin>>dui[0];
	if (dui[0][0]=='.')
		over=true;
	while (!over)
	{
		num=1;
		while (dui[num-1][0]!='=')
			cin>>dui[num++];
		num--;
		assi();
		play();
		if (die==1)
			printf("WIN\n");
		else
			printf("LOSE\n");
		cin>>dui[0];
		if (dui[0][0]=='.')
			over=true;
	}
	return(0);
}