str:string;

a:array[1..1000000] of char;

b,o,c,h,d:array[1..1000] of integer;

i,j,n:longint;

ch:char;

procedure bifen(m:integer);

var

i,j,k:longint;

h,d:array[1..10000] of integer;

begin

i:=0;

j:=1;

repeat

inc(i);

if (b[i]=1) or (o[i]=1) then

begin

c[j]:=c[j]+1;

h[j]:=h[j]+b[i];

d[j]:=d[j]+o[i];

end;

if (c[j]>=m) and ((h[j]-2>=d[j]) or (d[j]-2>=h[j])) and (i<n)

then inc(j);

until i=n;

for k:=1 to j do

writeln(h[j],':',d[j]);

end;

begin

n:=0;

repeat

inc(n);

read(a[n]);

until a[n]='E';

n:=n-1;

fillchar(b,sizeof(b),0);

fillchar(o,sizeof(o),0);

for i:=1 to n do

begin

if a[i]='W' then b[i]:=1;

if a[i]='L' then o[i]:=1;

end;

bifen(11);

writeln;

bifen(21);

end.