B14

.data
    string: .string "YVANEHTNIOJ"
    indice: .word 0
.text
    la x5 indice
    lw x5 0(x5)
    la x6 string
    li a7 11
loop:
    add x7 x5 x6
    lb x8 0(x7)
    beq x8 x0 mostrar
    addi x5  x5 1
    bne x8 x0 loop
mostrar:
    add x7 x5 x6
    lb a0 0(x7)
    ecall
    addi x5 x5 -1
    bne x7 x6 mostrar