.roller {
    display: inline-block;
    position: relative;
    overflow: hidden;
    height: 20px;
    width: 14px;
    font-family: monospace;
    font-size: 20px;
    line-height: 1;
    vertical-align: top;
}

.roller .reel {
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease-out;
}

.roller .reel div {
    height: 20px;
    text-align: center;
}

.static-char {
    display: inline-block;
    width: 14px;
    height: 20px;
    font-family: monospace;
    font-size: 20px;
    line-height: 20px;
    text-align: center;
    vertical-align: top;
}