.letra {
	display: inline-block;
	width: 50px;
	height: 50px;
	margin-right: -4px;
	margin-bottom: -10px;
	background: transparent url(../img/letras_40.png) no-repeat 0 0;
}
.letra.espacio { background-image: none; }


.letra.a { background-position: 0 0; }
.letra.b { background-position: -50px 0; }
.letra.c { background-position: -100px 0; }
.letra.d { background-position: -150px 0; }
.letra.e { background-position: -200px 0; }
.letra.f { background-position: -250px 0; }
.letra.g { background-position: -300px 0; }
.letra.h { background-position: -350px 0; }
.letra.i { background-position: -400px 0; }
.letra.j { background-position: -450px 0; }
.letra.k { background-position: -500px 0; }
.letra.l { background-position: -550px 0; }
.letra.m { background-position: -600px -0px; }
/* SALTO DE LINEA */
.letra.n { background-position: 0 -50px; }
.letra.o { background-position: -50px -50px; }
.letra.p { background-position: -100px -50px; }
.letra.q { background-position: -150px -50px; }
.letra.r { background-position: -200px -50px; }
.letra.s { background-position: -250px -50px; }
.letra.t { background-position: -300px -50px; }
.letra.u { background-position: -350px -50px; }
.letra.v { background-position: -400px -50px; }
.letra.w { background-position: -450px -50px; }
.letra.x { background-position: -500px -50px; }
.letra.y { background-position: -550px -50px; }
.letra.z { background-position: -600px -50px; }