def isinvalid (str)

	# bus = 0

	# while str =~ /[GR]/
	# 	isvalid = str =~ /^(W*?)WG([WG]*?)R(.*)$/
	# 	return true unless isvalid

	# 	str = "#{$1}#{$2}#{$3}"

	# end

	# false
	# 
	# 
	
	bus = {}
	bus['W'] = bus['G'] = bus['R'] = 0
	
	str = str.split('')

	for c in str do
		bus[c] += 1
		return true if bus['W'] < bus['G'] || bus['G'] < bus['R']
	end

	bus['G'] != bus['R']

end

def main ()
	flandre = gets.chomp.to_i(10)

	for i in 0...flandre do
		str = gets.chomp
		x = ""
		x << "im" if isinvalid(str)
		puts x << "possible"
	end
end

main()